中国国家主席胡锦涛同美国总统奥巴马在举行正式会谈前的讲话 中国北京 人民大会堂 2009年11月17日 Remarks by US President Obama and Chinese President Hu Jintao Before Expanded Bilateral Meeting Great Hall of the People, Beijing, China November 17

So remember, I said 4D. So today for the first time, we're unveiling a new project, which is a collaboration with Stratasys, and it's called 4D printing. 还记得我刚才提到了四维，今天我们首次向大家展示一个新项目，这是和Stratasys公司一同合

The whole time he was talking to me, 整个谈话期间 I sat there smiling and nodding like a numb idiot, 我麻木的像个傻子。 with my arms crossed over my chest, 双手交叉在胸前， while nothing, nothing, nothing came out of my thr

I thought I would start with a very brief 我觉得我得从城市的历史 history of cities. 简单说起 Settlements typically began 人们聚井而居 with people clustered around a well, and the size 揭开了典型的定居生活 of that settlement was rou

We must make sure that our Coast Guard members serving on the front lines are given the resources they need 我们必须确保我们在前线的海岸警卫队队员，能够得到他们需要的资源， to defend America and our vital interests in our own hemisp