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2017年10月21日 19:58:59    日报  参与评论()人

河南中医学院第三附属医院光子嫩肤手术多少钱郑州省人民医院祛痣价钱费用河南省郑州华山整形医院打溶脂针价钱费用 Money really does grow on trees – at least in Australia.树上真的可以长黄金——至少在澳大利亚是如此。Scientists have found gold in the leaves of eucalyptus trees.科学家们在桉树树叶里找到了黄金。The particles are much too small to be seen with the naked eye but have been detected using a type of x-ray that is especially good at picking up trace amounts of metals and minerals.这种树叶中含有的黄金粒子十分微小,不足以凭肉眼观察到,但是科学家们通过一种专门探查微量金属和矿物的X射线仪器发现了它们。However, gold hunters shouldn’t start felling gum trees in the hope of becoming rich.但是,猎金者们大概不能通过伐木来采金致富。Study leader Mel Lintern told the Brisbane Times: ‘If you had 500 eucalyptus trees growing over a gold deposit, they would only have enough gold in there to make a wedding ring.’科研小组的领队梅尔·林特恩对记者说,“如果让500棵桉树生长在一个金矿上,这些树中收集到的金子大概足够打一枚金戒指。”The real value of the study is that nature’s own version of gold leaf could provide mine companies with an inexpensive and environmentally friendly indicator of where to drill test sites.这一研究的真正价值在于,这种自然界而非小说里出现的金叶子可以充当金属探测器,这种探测方式既环保又方便,可以告诉探勘者在哪里能开采到金子。The study by the Commonwealth Scientific and Industrial Research Organisation in Western Australia showed levels of the precious metal were highest in trees growing directly over gold seams, one of which was 115 feet down.这项研究成果是由澳大利亚西部的联邦科学与工业研究组织成员做出的,该研究组织发现,直接生长在金矿层上的桉树叶中的黄金含量是最高的,其中一个金矿在地下115英尺(约35米)深。The researchers believe the gold was taken up by the trees’ extensive roots from while scouring for water during times of drought.研究者们相信,树叶中含有的金子是树根在干旱时期、四处蔓生以寻找水源时被吸取到树中的。It was then transported through the tree to the leaves, where concentrations are higher than in the twigs, trunk or surface soil.被树根吸取的金子被输送到枝干和叶子中,金子在叶子中的密集度比在树枝、树干和表层土壤中都要高。The researchers said: ‘Gold is probably toxic to plants and is moved to extremities, such as leaves in order to reduce deleterious biochemical reactions.’研究者说,“对于植物来说,黄金是有毒的,因此黄金被传送至树叶等植物的末端,这样可以减少破坏性的生化反应。”Writing in the journal Nature Communications, they said it was the first time that gold had been found naturally incorporated into a living thing.这一研究成果已经在《自然通讯》期刊上发表,科学家称,这是人们首次在植物体内发现自然贮藏的黄金。 /201310/262668口吃是交流和学习语言的重大难题,对于有点口吃的人总想着如果能治疗口吃那该多好啊,可以尽情表达自己的想法,在《国王的演讲》中,我们看到了使用音乐和唱歌来治疗口吃,到底这种方式是否有效呢?在《国王的演讲》中,乔治六世在莱昂内尔·罗格用的帮助下,通过听音乐和唱歌来使说话变得容易。而现在,科学家们已发现唱歌对治疗口吃非常有效的原因。In The King’s Speech, George VI received help from Lionel Logue, by listening to music and singing to speak easier.Now scientists have discovered why singing is so effective at treating a stammer.马克斯·普朗克研究所的科学家们表示,令人惊讶的是,这项技术和旋律没有任何关系,而是基于节奏。研究人员发现,有节奏的表达非常熟悉的歌词以及公式化的短语,无论是唱或是说,都对清晰发音有很大的影响。该结果很可能会开辟一条治疗言语障碍的新疗法。Surprisingly it has nothing to do with the melody but instead is based on the rhythm, say scientists at the Max Planck Institute in Germany.Researchers found that highly familiar song lyrics and formulaic phrases expressed rhythmically had a strong impact on articulation – regardless of whether they were sung or spoken. The results may lead the way to new therapies for speech disorders.小组研究的人群是一些遭受左脑中风的人,他们大脑左半球的言语区遭到破坏,导致他们说话困难。唱歌被认为可以刺激大脑右半球的一片区域,那片区域将承担受损左脑言语区的功能。最近的研究显示:经过几个月的时间,病人唱出如同“你好吗”一样公式化的短语后,他们大脑的右半球的确发生了一些变化。The team studied people who had suffered a left-sided stroke, which had damaged speech areas in the brain’s left hemisphere, leading to difficulties speaking.Singing was thought to stimulate areas in the right hemisphere, which would then assume the function for damaged left speech areas. Recent research has shown that changes indeed occur in the right brain hemisphere of patients after singing formulaic phrases like ‘How are you?’ over a period of months.为了找出唱歌是如何如何治疗口吃的,本杰明·斯塔尔和同事们实施了一次研究。17位有言语障碍的中风患者必须清晰的说出几千个音节,这些音节在有节奏或无节奏的伴奏下被演唱及背诵。结果表明,唱歌并不是治疗这些患者的决定性因素。对歌词的熟悉度以及文字是否包含公式化短语更重要。To find out how singing works, Benjamin Stahl and colleagues conducted a study in which 17 stroke patients with speech problems had to articulate several thousand syllables, which were sung and recited with rhythmic or arrhythmic accompaniment。The results showed that singing was not the decisive factor for the patients. The level of familiarity with the song lyrics and whether the texts contained formulaic phrases was found to be even more important.目前,本杰明·斯塔尔正在进行更进一步的研究。这很可能会有令人兴奋的前景,很可能会提高患者生活质量。Benjamin Stahl is presently conducting further studies which aim to tap into the resource of rhythmic and formulaic speech for rehabilitative therapies. This could offer exciting prospects for improving the quality of life for patients. /201306/243736郑州三院脱毛手术价钱费用

郑州半导体激光脱体毛哪家医院好郑州无痛脱毛费用 Why is Facebook buying WhatsApp for billion? At this very moment, I am looking at a text file showing me 5,600 possible explanations. That#39;s how many WhatsApp messages were exchanged between me and a friend in a single three-month period of 2012, when we were averaging about 60 back-and-forth messages a day.为什么Facebook要拿出190亿美元巨资收购WhatsApp?此时此刻我正在看一个文本文档,也许它可以解释其中的原因。这是2012年区区三个月的时间里我和一位朋友之间互发的5,600条信息,平均大约60条。It was probably a time of above-average communication -- and the messages were with a woman of above-average beauty and conversational smarts, so I had my reasons -- but it is still a useful window into how instant messaging sits right at the heart of the battle for attention that now dominates the technology industry. Skimming over those messages -- from the breezy rituals of good mornings and how are yous to hour-long heart-to-hearts -- shows how our phones are still fundamentally communicators, and how chatting, like everything else, is now facilitated by apps.那段时间可能我挺爱聊的吧,而且我的聊天对象是一个漂亮、健谈的女士,因此我们相谈甚欢。不过,我们从中可以看出,在科技行业抢夺用户注意力的战争中,即时短讯务俨然已经成为焦点。借助这项务,人们可以互道早安、问好,还可以整小时整小时推心置腹地谈天。这些短讯明,我们的手机从根本上来讲仍然是交流工具,而且五花八门的应用正让交流变得更加容易。I was living in Dubai when those 5,600 messages were exchanged, and one of WhatsApp#39;s most notable traits is that it seems to be significantly more popular outside the U.S. than it is within - almost all of my phone book#39;s contacts in Europe, the Middle East or Australia are active on WhatsApp, while the ratio is much lower here in America.我和朋友聊得火热的那段日子我正住在迪拜,而且WhatsApp最显著的一个特征就是,它似乎在美国以外的地区要更受欢迎――我电话簿里面分布在欧洲、中东和澳大利亚的联系人几乎全都爱用WhatsApp,而美国本土的比例就低得多。At its core, WhatsApp is just a nicely-done messaging app that lets you send text, pictures and to your friends anywhere, free. Unlike Apple#39;s iMessage, it works on all the major mobile operating systems; unlike the text messaging services offered by mobile network operators, it doesn#39;t charge you anything for sending the messages, and it works like modern mobile software, not the primitive SMS applications on most phones.核心问题在于,WhatsApp仅仅是一款不错的短讯应用,你可以免费给各地的朋友发送文字、图片及视频。与苹果(Apple)的iMessage所不同的是,这款应用在所有主要移动操作系统上都可以运行;而且你发信息完全免费,不像移动网络运营商的短信务还要收钱;再者,它是一款新型移动软件,不是多数手机上那种老旧的短信应用。The problems WhatsApp solves could, in part, also explain why it is less of a big deal at home in the U.S. Most monthly mobile plans here include unlimited text messaging, creating an all-you-can-eat mentality around sending SMS that didn#39;t exist overseas, where operators often charged per message. And while 310 million Americans share a single nation -- and telephone network -- in the rest of the world national boundaries between people are more likely to introduce the expensive headache of international calling and text messaging. That#39;s another problem solved by WhatsApp.WhatsApp的上述优点或许可以部分解释为何它在美国本土不太流行。美国多数包月移动套餐都包含了无限量短信,向用户传递出一种“随便发”的信号,而在很多国家都没有这种务,运营商对短信按条收费。而且,虽然3.1亿美国人共享着同一个电话网络,但在世界上其他国家,打国际长途、发越洋短信可能昂贵得令人头痛,这个问题在WhatsApp那里也得到了完美解决。But ultimately, the appeal of mobile messaging software is the same as the appeal of everything else on a mobile: it#39;s with you all the time, it#39;s always connected, and it has an immediacy that can#39;t be matched. When friends are on WhatsApp, or iMessage, or BlackBerry Messenger, it#39;s like you#39;ve opened up an endless two-way chat room.不过,归根结底,移动短讯软件的诱惑力其实就是“移动设备”本身的吸引力:它总是伴随在你左右,它和外界的联系永远不会断,它拥有无与伦比的即时性。无论朋友们用的是WhatsApp、iMessage还是黑莓(BlackBerry)的Messenger,只要他们在线,就好像为你开启了一间畅所欲言的聊天室一样。And once it#39;s open, the marginal cost of sending one more message, or sharing one more picture, is so close to zero that before you know it, you#39;ve sent a few thousand of them, in a few months, to a beautiful women a couple of thousand miles away.只要打开该应用,就可以无限量发送信息及图片、而且成本几乎为零。比如我,短短几个月的时间里就跟数千公里之外的美女朋友互发了数千条信息,当时我都没意识到发了这么多。The centrality of instant messaging to our mobile lives can be seen in how the giants of the industry have approached it. Apple#39;s iOS and Google#39;s Android have both built messaging applications that erase the distinctions between SMS messages sent over the mobile network and web-based instant messages, pushing users into their own messaging platforms in the process. BlackBerry has long highlighted it#39;s BlackBerry Messenger service -- another mobile messaging product wildly popular abroad -- as one of its trophy assets.即时通讯之于移动生活的重要性,从科技巨头们趋之若鹜的态度就可窥知一二。苹果的iOS、谷歌(Google)的安卓(Android)操作系统都建立起了短讯应用,来消除手机短信务和基于互联网的即时讯息之间的差异,将用户吸引到他们自己的短讯平台上来。黑莓也一直在大力宣传它的“得意之作”BlackBerry Messenger务,这种产品在美国以外的地区也很受欢迎。Facebook added instant messaging to its Instagram photo sharing service, tried without success to buy messaging service Snapchat, and has now spent as much money buying WhatsApp as the market value of American corporate giants like Gap, Blackstone or Harley Davidson.Facebook也给旗下的Instagram照片分享务添加了即时通讯功能,但收购短讯应用Snapchat的尝试未能成功。现在,该公司又豪掷亿金收购WhatsApp,其斥资之巨堪比Gap、黑石集团(Blackstone)、哈雷戴维森公司(Harley Davidson)等美国企业巨头的市值。Is the valuation worth it? I have no idea, but I do know this: last week, after a years of constant usage and tens of thousands of messages, WhatsApp told me my free trial period was coming to an end, and I needed to cough up a dollar for another year of service. I paid it without second thought, and I#39;ll bet a large majority of the company#39;s 450 million active users will do the same.这样的大手笔值得吗?我也不知道,但我清楚一件事:在我用了好几年、发送出数万条信息之后,WhatsApp上周告诉我,免费试用即将到期,我需要缴费1美元才能获得一年的务。我毫不犹豫地付了1美元,而且我敢打赌,WhatsApp那4.5亿名活跃用户肯定大多数都和我的想法一样。 /201402/276707开封市中心医院绣眉手术多少钱

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