文章列表

• 1.【英语时差8,16】衣服为什么会缩水？（下）
• In your pants, the straightened polymer chains have a natural tendency to spring back to their original, tightly-coiled state. Fortunately for clothin...
• 2.【英语时差8,16】动物肚皮上的轻皮毛（下）
• How ?Its because whe the r you evolved in the savannas of Africa or the woods of North America, the sun was always in the same place: overhead. That m...
• 3.【英语时差8,16】微笑的声音
• Don: Hi everyone. On this show we usually talk about other people's experiments, but today we're going to do an experiment of our own. Here's the deal...
• 4.【英语时差8,16】沉河三角洲
• River deltas are the broad coastal valleys where rivers end their long trek and empty into the sea. Standing on a river delta, you might expect to see...
• 5.【英语时差8,16】为什么闭着眼睛很难单脚站立？（上）
• Try standing on one foot. Not so hard, you say? Try it with your eyes closed. Aha! Suddenly things got much harder. With eyes closed you may begin to ...
• 6.【英语时差8,16】衣服为什么会缩水？（上）
• If your hair drier shrunk your head to the size of a grapefruit, youd be astounded. If your wool pants shrank in the drier, youd be angry but not amaz...
• 7.【英语时差8,16】动物肚皮上的轻皮毛（上）
• Ever notice how many animals have lighter fur on their bellies than on their backs? Think about it. Cats and dogs often have lighter-colored bellies. ...
• 8.【英语时差8,16】听到胎儿
• Did you ever do this when you were young: Dive to the bottom of a swimming pool with a friend, then have your friend yell a phrase into the water? You...
• 9.【英语时差8,16】“二次浸釉”-真的很糟吗？（下）
• The Results? Without question, double dipping significantly contaminated the dip with oral bacteria. After three dips of an unbitten chip or cracker t...
• 10.【英语时差8,16】无声杀手
• You've seen them in spy movies. The evil assassin is about to kill the helpless victim, but he's worried that someone might hear the shot. What's an e...