June 14, 2007 THE PRESIDENT: It's been my honor to receive General Dempsey and his wife here to the Oval Office to thank both of them for their service to the country. General Dempsey has just come ou
If there's a building down the block which is being demolished, are there materials there that the new building being built here can use? 如果不远处有一栋楼正在被拆毁，拆下来的这些材料中有没有一些是这边的新建筑物可以使用的？ Can we use that, t
Hi, everybody. In recent weeks, you might have noticed something. Or maybe even heard the sound of it if you live close enough. New homes are going up. In fact, construction workers are breaking groun
You need an AUV, an autonomous underwater vehicle. 你需要个AUV，一个自行式水下航行器。 It needs to be one smart puppy, able to navigate and make decisions on its own in an alien ocean. 它必须很聪明，能够自己导航在陌生的外星球的大洋里能够自己做决定
