美国科学60秒 SSS 2013-01-09
时间：2018-12-24 作者：英语课 分类：Scientific American(一)月
英语课
This is Scientific Americans 60 - Second Science, I am Karen Hopkin, this will just take a minute.
After a long bath, your fingers and toes come out all wrinkly. You may have wondered why your skin would go and do such a thing. Now a study shows that puckered 1 digits 2 give us a surer hold on objects that are slippery when wet. This gripping discovery appears in the Royal Society journalBiology Letters.
It might seem like magic, or maybe osmosis, that sets your fingertips rippling 3 after being submerged for awhile. But it’s actually an active process that’s controlled by the same part of the nervous system that regulates your heartbeat, breathing and even sweat. So, underwater wrinkling is something your body does on purpose.
To explore the potential advantages of waterlogged fingertips, researchers asked volunteers to move a bunch of marbles from one bucket of water to another. Sometimes their fingers were wrinkled, sometimes they were smooth. The results: subjects were more nimble with the wet marbles when their fingers were wrinkled.
Could be that this mechanism 4 gave our ancestors a leg-up, or hand-up, when it came to grabbing wet fruit or dashing through the rain. Now science has shown that wrinkled fingers also help keep us from losing our marbles.
Thanks for the minute for Scientific Americans 60 - Second Science, I am Karen Hopkin.
wrinkly: 有褶皱的
gripping: 扣人心弦的
osmosis: 渗透
rippling: 起波纹状的（ripple）
waterlogged: 吸满水的
nimble： 敏捷的
leg-up: 帮助
1 puckered
v.（使某物）起褶子或皱纹( pucker的过去式和过去分词 )
- His face puckered , and he was ready to cry. 他的脸一皱，像要哭了。
- His face puckered, the tears leapt from his eyes. 他皱着脸，眼泪夺眶而出。 来自《简明英汉词典》
2 digits
n.数字( digit的名词复数 )；手指，足趾
- The number 1000 contains four digits. 1000是四位数。 来自《简明英汉词典》
- The number 410 contains three digits. 数字 410 中包括三个数目字。 来自《现代英汉综合大词典》