Her early years were dominated by 9/11, by working to fund the recovery, then monitoring the health and providing compensation to victims and first and second responders. 早些年她需要密集处理9·11事宜，为复原寻求资金支持，监控
MRS. OBAMA: Well, it’s good to see you all again! (Applause.) You are the first in this series. The first! Nobody has done this yet. You’re the very first. But let me tell you a little bit
35. The Great (Trade) Wall of China 35. 中国的（贸易）长城 President Bush believes that open markets and a level playing field are vital to job creation and economic growth. That is why the president rejects e
The reason that Vibrio fischeri is doing that comes from the biology. 费氏弧菌的发光现象来自生物学上的原因。 Again, another plug for the animals in the ocean, Vibrio fischeri lives in this squid. 接下来，我们再来看一个海洋生物：费式弧菌寄生在
THE PRESIDENT: Good morning. This week, millions of Americans gather with loved ones for Christmas. This is a season of hope and joy. And it is an occasion to remember a humble birth that has helped s
