In fact,they found that at least 800 genes spring into action in a finch's brain whenever it sings.

VOA: standard.2010.04.05

suppose I asked you to time a 100 meter spring in the Olympics, but I give you a stopwatch that is measured in units of 15 seconds?

如果我要求你,在奥林匹克数给100米短跑计时，但我会给你一个秒表,它可以测出15秒的大小？

麻省理工公开课 - 固态化学导论课程节选

You cannot have a spring pulled only at one side, because then it will then accelerate with infinite acceleration in that direction.

你不可能对弹簧只施加一边的拉力,因为那样的话弹簧就会以无穷大的加速度加速,就在这个方向上

耶鲁公开课 - 基础物理课程节选

There are warnings that spring in this part of the southern hemisphere is likely to bring more hot weather, exacerbating a long drought.

VOA: standard.2009.09.03

The other would be characteristic of agriculturalists: it would be an offering of the very first barley that would be harvested in the spring.

另一种是具有务农者特色的,他们献上的是春天里收获的第一颗大麦粒。

耶鲁公开课 - 旧约导论课程节选

In the case of a spring, this is the law that you will deduce.

在弹簧这个例子里,这就是你推导出来的定律

耶鲁公开课 - 基础物理课程节选

It says, if you pull it to the right, so that x is positive, the spring will exert a force which is in the negative direction; that's why you have a minus sign.

就是说,如果你向右拉,x 取正值,弹簧产生的力方向为负,这就是这里用负号的原因

耶鲁公开课 - 基础物理课程节选