• 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

  • If you put your fingers between the plastic opening at the bottom, and here's where you gotta watch out for the spring, pull the thing apart and that's it.

    如果你把手指放到,底部的缝隙中间,这里你需要小心,你剥开就会发现这个了。

    哈佛公开课 - 计算机科学课程节选

  • Newton is not going to come and tell you what force the spring will exert when it's pulled by some amount.

    牛顿不会过来告诉你,弹簧被拉伸一定量时会产生多大的力

    耶鲁公开课 - 基础物理课程节选

  • If you connect the body to a spring, which is neither compressed nor extended, there's no force acting on it.

    如果将一个弹簧连在这个物体上,弹簧既没有被压缩也没有被拉伸,也不会有力作用在它上面

    耶鲁公开课 - 基础物理课程节选

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