When the crowd disassembled, we left the square.

人群散开时，我们也离开了广场。

youdao

When the crowd thinned, we left the square...

人群散开的时候，我们离开了广场。

youdao

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

Someone, Mark Hatch, if I had to guess, has left a Square reader just to the left of where we've set up our cameras.

ENGADGET