And if we're more concerned about our fellow primates than we are about insects, as indeed we are, 如果和昆虫做比较，我们比较关心我们自己的物种 it's because we think they're exposed to a greater range of potent

　　What if I told you there was something thatyou can do right now that would have an immediate, positive benefit for yourbrain including your mood and your focus? And what if I told you that samething

Hi, everybody. 大家好！ I'm here at Children's National Medical Center in Washington, D.C., visiting with some kids being treated here all the time for asthma and other breathing problems. 此刻，我在华盛

Prepared Remarks of President Barack ObamaWeekly AddressThe White HouseJune 27, 2009 Yesterday, the House of Representatives passed a historic piece of legislation that will open the door to a clean e

President Obama introduces Jacob Lew as his nominee to become director of the Office of Management and Budget. The President praises Lew for his role in balancing the budget when he led OMB from 1998