Scientific American 60 Second Science听抄（有音频文件）

kelediguoUID: 149939

woodman回来了

[ 本帖最后由 kelediguo 于 2007-7-20 01:12 编辑 ]

xbx_leeUID: 129512

cool. ..

yingxin6140UID: 2316825

加油啊！

dcbUID: 2232749

被xbx_lee大牛问问题了，小弟不敢当~~实在是碰巧，这几天看了不少文章，居然就分别看到那几个词的相关内容，也是这样才可以写出来的~~不敢关公面前耍大刀呀呵呵~~
还是zhenzhen的话，阅读面广有助听力呀（当然不是说我自己啦，呵呵）~~
看到kelediguo，xbx_lee等各位nn的帖子才知道自己错误还不少，觉得那个惭愧呀……努力改正~~

[ 本帖最后由 dcb 于 2007-7-20 14:34 编辑 ]

jiangsu87427UID: 2293276

楼上的请问你阅读是看的什么东东呀?"?? DELTA那些远远不能满足我们的需要呀

finalmanUID: 2275821

remarkable feet -> feat
会不会好点?

greatguyUID: 2361502

不是
是在 WWW.SCIAM.COM/PODCAST/

RaphealUID: 2336344

well , that's my version depends on the above:

       Mosquitos are a summertime menace, but they are also a marvel of mechanical engineering.   They can stick to your skin,cling to a wall and even walk on water. Now a team of  physicists from Canada and China has figured out how they do it ----the trick's in the feet. First of all (虽然听起来像first off，但放于此处解释不通：first off= immediately), mosquitos have tiny hooks on their tootsies，which they use to latch on the skin.  And they hang on to walls as the same way as  geckos do, using hairy little foot pads to let them stick to surfaces like they're wearing Velcro socks.  But it's the water-walking that  may be the most remarkable,er…feat.   To dance across a pond or stand on top of a puddle,  mosquitos use their super         hydrophobic legs. These limbs are so phenomenally water-repellent that each one could effectively support 23 times the insect's weight. At least that was physicists discovered when they took a single mosquito leg ,and measured the force needed to    push into a cup of water. The reason that the legs are so hydrophobic is because they’re coated with tiny feather like scales that in trun covered by even tinier ribbing. So next time you swat a skeeter, remember, you just whack the wonder of nature.

dcbUID: 2232749

July 20, 2007

It's checkmate for checkers-- the 5000-year-old game has been completely solved. That a checker-playing computer called Chinook cannot be beaten. That's according to University of Alberta computer scientist's publishing in the latest issue of the journal Science. The researchers spent almost 2 decades going through the 500 billion billion possible checkers' positions, which is still an infinite testimony small fraction of numbers of check's position by the way. The checker ever included top players who helped the research team program checker's rules of thumb into software that categorized moves as "successful" or "unsuccessful". Then the researchers let the program run on average 50 computers daily, some days the program ran on 200 machines, while the researchers managed progress and twigged the program accordingly. In fact, she looked (need a 'to'?)beat humans to win the championship back in 1994. "But it did not yet become perfect". The process has now done and itch (?not sure) the programmers developed into a database that knows optimal move in any possible checker's situation. If human opponent plays a perfect game, here she can hope for a tie.

[ 本帖最后由 dcb 于 2007-7-21 00:55 编辑 ]

kelediguoUID: 149939

Good job, dcb!

2007-07-20

It’s checkmate for checkers, the 5,000-year-old game has been completed solved, that a checkers-playing computer called Chinook cannot be beaten. That’s according to University of Alberta computer scientists publishing in the latest issue of the Journal Science. The researchers spent almost two decades going through the 500 billion billion possible checkers positions, which is still an infinite ?? small fraction of the number of chess positions by the way. The checkers effort included top players who helped the research team program checkers’ rules of thumb into software that categorized moves as successful or unsuccessful. Then the researchers let the program run on an average of 50 computers daily. Some days the program ran on 200 machines while the researchers monitored progress and tweaked the program accordingly. In fact, Chinook beat humans to win the checkers world championship back in 1994. “But it did not yet become perfect.” That process is now done in the Chinook program as developed into a database that knows the optimal move in any possible checkers situation. If human opponent plays a perfect game, he or she can only hope for a tie.

H-KevinUID: 2182070

July 18

Based on kelediguo

In 1986, an explosion at the Chernobyl nuclear power plant blanketed the surrounding area with radioactive fallout. Now scientists who have been tracking that disaster’s toll have added a new victim to their list--birds that live near the reactor. The interesting thing is not all the birds near Chernobyl have been decimated by radioactivity, only those that are brightly colored, migrate long distances or lay big eggs--all of which require antioxidant molecules. The researchers examined birds from 57 species. They found that those with bright plumage such as orioles and blue tits were harder hit by radiation than their drab neighbors such as coal-tits and chaffinches. The same was true for birds that tend to travel and like to lay large eggs. That pattern suggests that antioxidant molecules play an important role in how birds handle radioactivity because antioxidants can protect animals against nasty chemicals like those that spilled from the damaged reactor. But brightly colored birds use up their antioxidants producing those flashy red, yellow and orange pigments. So the Chernobyl meltdown may being bright a bust for birds while being dull is the thing to do.

H-KevinUID: 2182070

July 19

Based on kelediguo

Mosquitoes are summertime menace. But they are also a marvel of mechanical engineering. They can stick to your skin, cling to a wall and even walk on water. Now a team of physicists from Canada and China has figured out how they do it. The tricks are in the feet. First off, mosquitoes have tiny hooks on their tootsies which they use to latch onto skin. And they hang on to walls the same way geckos do, using hairy little foot pads that let them stick to surfaces like they’re wearing Velcro socks. But it’s their water-walking that may be their most remarkable feet. To dance across a pond or stand on top of a puddle, mosquitoes use their super hydrophobic legs. These limbs are so phenomenally water repellant that each one could effectively support 23 times the insect’s weight. At least that’s what the physicists discovered when they took a single mosquito leg and measured the force needed to push into a cup of water. The reason the legs are so hydrophobic is because they are coated with tiny feather like scales that are in turn covered by even tinier ribbing. So next time you swat a skeeter, remember, you just whacked  a wonder of nature.

happylhUID: 2259220

based on kelediguo

It’s checkmate for checkers, the 5,000-year-old game has been completed solved, that a checkers-playing computer called Chinook cannot be beaten. That’s according to University of Alberta computer scientists publishing in the latest issue of the Journal Science. The researchers spent almost two decades going through the 500 billion billion possible checkers positions, which is still an infinitesimal  small fraction of the number of chess positions by the way. The checkers effort included top players who helped the research team program checkers’ rules of thumb into software that categorized moves as successful or unsuccessful. Then the researchers let the program run on an average of 50 computers daily. Some days the program ran on 200 machines while the researchers monitor progress and tweak the program accordingly. In fact, Chinook beat humans to win the checkers world championship back in 1994. “But it did not yet become perfect.” That process is now done in the Chinook program as developed into a database that knows the optimal move in any possible checkers situation. If human opponent plays a perfect game, he or she can only hope for a tie.

ManmanyipUID: 2299676

It’s checkmate for checkers, the 5,000-year-old game has been completed(应该是completely吧？) solved, that a checkers-playing computer called Chinook cannot be beaten.

zhenzhen_163UID: 196150

Great job, kelediguo!   :)

So the Chernobyl meltdown made being bright a bust for birds while being dull is the thing to do.