【听力材料持续更新】科学美国人 Scientific American 60-second Science 音频+文本

宇宙婴儿UID: 2631584

由于LZ准备托福期间每日听SA，所以特地将资料上传，大家一起进步！
（受附件大小限制，每次上传均分为两个包，需两个包都下载才能解压）

快速通往楼层：
2012-5-30 https://bbs.gter.net/forum.php?mod=viewthread&tid=1384736&page=1#pid1776004942
2012-5-31 https://bbs.gter.net/forum.php?mod=viewthread&tid=1384736&page=1#pid1776005957
2012-6-1  https://bbs.gter.net/forum.php?mod=viewthread&tid=1384736&page=1#pid1776007733
2012-6-6  https://bbs.gter.net/forum.php?mod=viewthread&tid=1384736&page=1#pid1776015134


===========================并不华丽的分割线================================


May 30, 2012
Streetlights Draw Insects at Ground Level

You've probably seen clouds of insects swirling round a streetlamp at night. But something you may not have noticed is that streetlights attract bugs to the ground below them, too—especially carnivorous bugs, like beetles. So says a study in the journal Biology Letters by researchers at the University of Exeter. Thomas W. Davies, Jonathan Bennie and Kevin J. Gaston,"Street lighting changes the composition of invertebrate communities"]
The researchers set up 28 traps in the grass below and between streetlamps in the English town of Helston, in Cornwall. They collected captured insects at dawn and dusk over three days, and ended up with nearly 1,200 specimens. Turns out, more bugs hung out under the lights than between them. And that was true at night and day—suggesting that streetlights permanently upped the value of the buggy real estate below them.
The researchers also found greater numbers of predators and scavengers under the lamps—like ground beetles, harvestmen and ants—because it may be easier to hunt for prey with the help of a spotlight.
With artificial lighting increasing globally at 6 percent a year, the authors say there's a chance light pollution could shake up food webs in unforeseen ways. Call it a bug in the system.
—Christopher Intagliata

奔跑蜗牛UID: 2579189

谢谢楼主

宇宙婴儿UID: 2631584

谢谢楼主
奔跑蜗牛 发表于 2012-6-1 09:05

不用谢！继续上传——

2012-5-31

“Say Wilbur, get a load of this story.” If you grew up in the sixties, you probably recognize the voice of Mr. Ed, TV’s talking horse. And it turns out, he might recognize your voice, too. A new study shows that even non-talking horses can tell individual people apart based on the sound of their voice.

Researchers put 32 horses in front of a familiar trainer and a new person. When the horses heard their trainer’s voice coming from a loudspeaker, they looked at their trainer almost exclusively. When the stranger’s voice was heard, they were about equally likely to look at either person.
Another test used 10 trainers the horses were familiar with. And when the animals heard a voice, they looked at the correct person faster and concentrated on that person much more than any of the other choices. The study appears in the Proceedings of the Royal Society B.

Researchers think the ability to recognize individual handlers might be rooted in the relationships the steeds have with their conspecific NEIGHHHHbors. I mean, neighbors.
—Amy Kraft

lu_squareUID: 2678460

打算继续冲刺TOFEL吗？ SSS语速好快的说 加油！

宇宙婴儿UID: 2631584

打算继续冲刺TOFEL吗？ SSS语速好快的说 加油！
lu_square 发表于 2012-6-1 15:48

对，接下来就是TOEFL了。有点快，慢慢习惯吧，这个都听懂了就没什么好怕的了。据说科学美国人是托福段子的一个重要来源，所以熟悉一下应该有好处吧。

宇宙婴儿UID: 2631584

The biggest risk for breast cancer patients is usually not original tumor, which is removed by surgery. The cancer becomes particularly deadly if it metastasizes and forms tumors elsewhere in the body.
        But drugs to target the metastatic process would fail the current clinical-trial system for breast cancer treatments.
        Patricia Steeg is the chief of the Women’s Cancers Section at the National Cancer Institute. She argues in the journal Nature that a new approach is needed in testing and approving breast cancer drugs.
        New breast cancer drugs today must demonstrate that they shrink established tumors. But a beneficial drug might not reduce the size of a tumor. Instead, it might fight metastasis in a number of ways—it could kill keep cells from escaping the tumor, or kill them in the bloodstream.
        Steeg argues that the FDA needs to change the model, and that anti-metastasis drugs should be tested in combination with current therapies. The success should not be related only to shrinking tumors, but rather to preventing new tumors from forming. She says this approach will help not only breast cancer patients, but millions of survivors in remission who worry that a new tumor will appear.
        —Cynthia Graber

diehardUID: 2547783

宇宙婴儿真心是个好同志，很有分享精神，特来表示支持。

aixi1991UID: 3235875

LZ加油啊~~看到5.27G战友了
同转来T版了

okqishiUID: 3245371

从G版过来看看
宇宙婴儿童鞋加油啊
赞分享！

宇宙婴儿UID: 2631584

感谢各位G友，有你们的支持真温暖！
下面继续上传这几天下载的，文本就请大家参考官方网站：http://www.scientificamerican.com/podcast/

秋雨荆州UID: 2903781

感谢分享

gdy0328UID: 3409122

赞

CarinnnnnnUID: 3647001

感谢分享~