60s Science---From everyday collection to environmental protection, think Green!

阿泰UID: 209473

December 30, 2008 Brain Smarter Than We Are
http://www.sciam.com/podcast/epi ... han-we-are-08-12-30

We humans don’t always make the best choices. But now a study in the journal Neuron demonstrates that maybe our brains do make the best possible decisions—but only if it’s done unconsciously. Alex Pouget at the University of Rochester takes a look at unconscious information gathering. He says a lot of our good decisions—like stopping at a red light—are unconscious ones.

Subjects stared at dots moving around in random patterns on a screen. A controlled number were heading towards either the right or left of the screen. The subjects were asked if the dots were moving left or right. The longer subjects stared at the screen, the more sure they became of the answer.

Pouget analyzed the subjects’ neuronal patterns. If a few dots in the group moved to the right, a part of the brain that recognizes right-direction movement lit up. As time went on, it’d light up more and more frequently until the subjects gave a definitive answer. According to Pouget, the subjects were subconsciously gathering information until they finally felt sure of the answer. So the brain usually gets it right. Too bad we still seem to run so many red lights.

—Cynthia Graber

无难词

nickey0809UID: 2349468

http://www.sciam.com/podcast/epi ... ement-list-08-12-31

It’s the time of year to take a look back—and that’s just what the journal Science did as they listed their most important breakthroughs of 2008. At the very top of their list: reprogramming cells. Scientists were able to successfully transform cells from ill patients into stem cells. This is important in understanding exactly how cells develop, and it could be a crucial step in finding a way to treat disease by using a patient’s own cells.

A few other top achievements of 2008:
-For the first time, scientists have been able to actually see planets orbiting a distant star.
-A team discovered a catalyst that can facilitate using electricity to split water into hydrogen for a fuel cell.
-An entirely new family of high-temperature superconductors was discovered.
-And there’s been a genome sequencing bonanza, as new techniques make the process faster and cheaper. Mitochondrial genomes sequenced this year include extinct cave bears and most of a wooly mammoth. Not to mention a first draft of the full DNA sequence of a Neanderthal. Their genome sequence could explain why they could never sequence genomes.

—Cynthia Graber

阿泰UID: 209473

这个你读了吗

chz0223UID: 2583804

我也在做,不过每次都要错十来处...

1点50分UID: 2474836

版主 请问听写60s 有用吗？ 我感觉他 又好多专业词汇  
另外 听写完了 是不是应该跟读？跟读到什么程度呢？谢谢

阿泰UID: 209473

读到能熟读下来为标准

另外要把练习过的反复听

1点50分UID: 2474836

o 谢谢版主  哪听托福材料Barron比较好呢 还是这个60s 呢？
还有我现在听力总抓不住重点  请您指点~~

阿泰UID: 209473

都要练习

总是一个过程，慢慢来

1点50分UID: 2474836

我是第一次考 3月22考  不知道 时间够不  我一直在听写老托  谢谢你

阿泰UID: 209473

时间还是够的

阿泰UID: 209473

有难度的http://www.sciam.com/podcast/epi ... mic-course-09-01-01

不帖文本了，大家先练习，帖感想啊;d:

nickey0809UID: 2349468

听抄了啊， 这不过刚开始听困难的，很多专业词听不出来

nickey0809UID: 2349468

http://www.sciam.com/podcast/epi ... mic-course-09-01-01

没听出来的
zip 迅速划过
average speed 连读听了好多遍都没听出来，最后 看答案了
Kepler 猜到了但不会拼
perihelion 近日点
aphelion 远日点
tilt  n.  倾斜;
the tilt of the Earth’s axis 连读了……
发现自己听数字的本领都退化了，那几个数字听了好几遍才记下来
读得时候也是 在数字上停下来

[ 本帖最后由 nickey0809 于 2009-1-2 15:41 编辑 ]

阿泰UID: 209473

这个有难度，呵呵

hyacinthUID: 2184492

反复听之前不要熟读文本。。。

否则就练不出来了。。。