Called V-2 rockets, the German weapons carried a ton of explosives three hundred twenty kilometers.

VOA: special.2009.06.10

If you want to write it as a vector equation, you want to write it as v square over r minus-- I want to say that it's pointing in the direction toward the center.

如果要写出矢量方程,就应该写成 -v^2 / r,也就是说,方向就向圆心

耶鲁公开课 - 基础物理课程节选

As long as we understand that, we can do this cancellation and this says on the left-hand side the change in the quantity v square over 2 is a times the change in the quantity x.

只要我们明白这一点,我们就可以这样做简化,在等号左边,v^/2的变化量,为a乘以x的变化量

耶鲁公开课 - 基础物理课程节选

The army opened the V-2 launch program to American scientists at several universities.

VOA: special.2009.06.10

Civilian scientists used the V-2 rockets to study the Earth's atmosphere.

VOA: special.2009.06.10