It's the only way he'd let you go.

VOA: standard.other

He said, first, let it go a little distance, take the distance over time, that gives you the velocity now.

他说,首先,让它运动一小段距离,距离除以时间,你就能得到现在的速度

耶鲁公开课 - 基础物理课程节选

So, now he has decided to do it and he's gained recognition from the town council, let's say, and he can go forward.

好了,现在他想去建立一个殖民地,并且他得到了人民大会的批准,也就是,万事具备了

耶鲁公开课 - 古希腊历史简介课程节选