奥巴马讲话 美国当前在伊拉克的行动
This week, I authorized two operations in Iraq. First, I directed our military to take action to protect our American diplomats and military advisors serving in the city of Erbil. In recent days, terr
拜登2013宾夕法尼亚大学(10)
We're on the cusp of innovations that will literally change the world. 我们处在创新的最前沿 毫不夸张 这将改变世界 And some of the people who I had the honor of being honored with today with degrees can tell you more abou
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TED演讲:一项关于电动车的大胆计划(3)
Now that last mile, last foot, in a sense, is the first step of the infrastructure. 现在想想这最后一英里,最后一步,在某种意义上,是迈向基础设施的第一步。 The second step of the infrastructure needs to take care of the range extension.