You'll see why very soon, in such a way that the derivative is this given unit vector u hat.

你很快就会明白为什么,导数dr/ds等于给定的单位u向量。

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ASIP is a signals intelligence sensor payload developed by Northrop Grumman Mission Systems sector's Electromagnetic Systems Laboratory business unit for use on both the U-2 and Global Hawk.

ASIP是一个用于U - 2侦察机和“全球鹰”无人机的信号情报传感器载荷，由诺斯罗普·格鲁曼公司任务系统分部的电磁系统实验室商业部门开发。

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We were in a standard I. C. U. unit. Steve, who generally disliked cutting in line or dropping his own name, confessed that this once, he'd like to be treated a little specially.

我们曾在斯坦佛重症监护室就医，史蒂夫一贯不喜欢插队，也不愿亮出自己的名字，这一次却承认：自己想有一点特殊优待。

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The report said information requests by scientists not connected with the Climatic Research Unit, the C.R.U.,were continually rejected.

VOA: special.2010.04.27

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The writer, Richard Morais, responds Your points are noted, but these warnings were issued by the U.K. Foreign Office Travel Advice Unit and the U.S. State Department.

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