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2010年09月16日 英语听力 ⁄ 被围观 1,473 浏览数+
Toxin-loving Trees [audio:http://down02.putclub.com/virtual/backup/update/tlwz/201009/putclub.com_09081.mp3] 树木能调节气候,保持生态平衡,树木通过光合作用,吸进二氧化碳,吐出氧气,使空气清洁,新鲜。一亩树林放出的氧气够65人呼吸一辈子。树还能防风固沙, 涵养水土,吸收各种粉尘,一亩树林一年可吸收各种粉尘20-60吨.。树林也能够减少噪音污染,40米宽的林带可减弱噪音10-...
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2010年09月15日 英语听力 ⁄ 被围观 937 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201009/putclub.com_09121.mp3]Super Slow Weight Training 用超慢的速度举重,相对的就要花超长的训练时间。你以为这样做的训练效果会比 较好吗?Alabama大学的研究者针对两组进行29分钟训练的举重者进行研究。一组举重者的举重模式是花五秒举起、十秒放下,另一组则用传统模式的一秒 举起、一秒放下。结果显示,举重速度...
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2010年09月11日 英语听力 ⁄ 被围观 1,341 浏览数+
Painful Injections [audio:http://down02.putclub.com/virtual/backup/update/tlwz/201009/putclub.com_09031.mp3]相信大家都有过去医院打针的经历吧?不论你是因为生病还是去注射疫苗。小孩子 尤其害怕打针,一看到针就会使出吃奶的劲哭闹。这下着急的还有护士跟孩子的父母,想尽办法让孩子安静下来。 Sometimes people write to us here at Moment of Science to complain that all we ever talk about are quasars or...
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2010年09月11日 英语听力 ⁄ 被围观 1,528 浏览数+
Virtual Reality and Chemotherapy [audio:http://down02.putclub.com/virtual/backup/update/tlwz/201009/putclub.com_09091.mp3]VR在医学方面的应用具有十分重要的现实意义。在虚拟环境中,可以建立虚拟的 人体模型,借助于跟踪球、HMD、感觉手套,学生可以很容易了解人体内部各器官结构,这比现有的采用教科书的方式要有效得多。Pieper及Satara 等研究者在90年代初基于两个SGI工作站建立了一...
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2010年09月07日 英语听力 ⁄ 被围观 3,106 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201005/putclub.com_05233.mp3]Is it that your fourth cup of green tea today? Fifth. I gotta get my antioxidants somehow.Drinking green tea all the time may get a little boring but it's helping me stay healty.Antioxidants fight cancer and heart disease. Who doesn't want to consume as many antioxidants as possible? But there are other ways besides green tea. Red wine, I know. But I can't drink wine at wor...
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2010年09月07日 英语听力 ⁄ 被围观 1,283 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201005/putclub.com_05252.mp3]A hand sanitizer contains alcohol, which kills the germs and then evaporates on contact. It also contains soothing emollients to counter the alcohol’s drying effect. Sure, hand sanitizers kill the germs on your hands–including the resident bacteria that live there, and the transient illness-causing bacteria you pick up off doorknobs. But unless you rinse them off in water, ...
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2010年09月07日 英语听力 ⁄ 被围观 1,172 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201005/putclub.com_05302.mp3]An apple a day keeps the doctor away. Family doctors are usually called GPs, or general practitioners. My name is Louis Brassy. I’m a so-called general practitioner doctor in the centre of London. I’m one of two doctors working in our clinic and between us we have, let’s say, 3,500 patients. England still has a system which it’s had, really, since the Second W...
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2010年09月07日 英语听力 ⁄ 被围观 629 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201006/putclub.com_0610.mp3] D: OK, Yael, if you were me, would you take your date to a violent action flick, or a romantic movie? Y: A romance, of course. D: There might be some scientific basis for why romantic movies make for good dates. In one study, participants were asked to watch a romantic movie and a violent movie, and watching the romance stimulated the viewers’ “implicit affiliation mo...
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2010年09月07日 英语听力 ⁄ 被围观 741 浏览数+
[audio:http://down02.putclub.com/virtual/backup/update/tlwz/201008/putclub.com_08161.mp3] 母 爱是世界上最伟大的爱。想过动物的母爱会是什么样的吗?有时候,人们会以为猕猴妈妈的爱似乎比较少见。事实上呢?让我们一起听听吧。 Picture a mother cradling her newborn infant.  She looks intently into the baby’s eyes, making kissing noises. It’s a typical scene, right? Except that the mother and baby are...
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2010年09月07日 英语听力 ⁄ 被围观 1,733 浏览数+
Hey! and then…Ouch! [audio:http://down02.putclub.com/virtual/backup/update/tlwz/201008/putclub.com_08311.mp3]伤害性刺激作用于末梢神经引起神经兴奋电活动,沿着脊髓传人神经纤维中的细纤 维(A和c纤维)传人脊髓,进而引起痛觉。痛觉是由于痛觉感受器受刺激而诱发的,其他感受器受到刺激产生相应的感觉,并非痛觉。人体内痛觉的传导依赖于机 体受刺激侧对侧脊髓前外侧1/4...
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