We recently saw a case where some researchers made the H5N1 avian influenza virus more potent. 我们最近观察到一个案例，发现一些研究员将H5N1禽流感病毒变得更强效。 It already has a 70 percent mortality rate if you get it, but it's ha

"This kind of innovative school…is an example of how all our schools should be," President Obama said yesterday, as he and Mrs. Obama visited a public charter school in Washington, D.

大学生英语演讲比赛稿带翻译1 　　Honourable judges, ladies and gentlemen, Good afternoon! Today I would like to talk about the importance of keeping opti 　　mistic. When we encounter difficulties in life, we notice th

Five score years ago, a great American, in whose symbolic shadow we stand signed the Emancipation Proclamation. This momentous decree came as a great beacon light of hope to millions of Negro slaves w

I took this picture in the Tihamah Desert while 25 millimeters -- that's an inch of rain -- was falling. 这张照片是我在提哈迈沙漠拍的——下着25毫米（一英寸）的雨。 Think of it in terms of drums of water, each containing 200 lite