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Time is precious. Nobody can afford to waste time. Once time has gone by, it will never return. You can never turn the clock back. Time passes very quickly. In fact, people say time flies. Time and ti
赖世雄初级美国英语
今天我们要讲的美国习惯用语是：Time flies. Time是时间，fly是飞， time flies就是时光飞逝。比如说，你已经有好几年没见你朋友的孩子了，现在他已经长得跟你一样高，这时候，你就会说, Wow,
美国习惯用语
I dont believe, in all my years, I have ever seen a fruit fly I would consider obese. But, thanks to the wonders of modern science, thats all about to change. Because a team of researchers from Cold Spring Harbor laboratory has produced the first fli
2017年Scientific American(一)月
This Scientific Americans 60 senconds science. I'm Cythia Graber. This will just take a minute. How did the zebra get stripes. One theory holds that stripes help confused predators. But stripes might be primarilly to protect zebras from ferocious ins
Scientific American(二)月
A robin is a pretty bird. It has a red breast. It has black wings. It sings a pretty song. A crow is pretty, too. It is completely black. It is shiny black. A crow is a big bird. It is a smart bird. It is a lazy bird. It watches people. People have f
简单慢速英语阅读
The Flies and the Honey-PotA NUMBER of Flies were attracted to a jar of honey which had beenoverturned in a housekeeper's room, and placing their feet in it,ate greedily. Their feet, however, became so smeared with thehoney that they could not use th
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