If you are playing a downbeat with an up-bow are you in good shape? No, no, no, no.

如果你用上弓去拉重音,你的形状会好吗,不会,绝对不会

耶鲁公开课 - 聆听音乐课程节选

In daily life, everything seems to come to rest unless you push it or you pull it or you exert some kind of force.

在日常生活中,一切物体都会停下来,除非你去推它,或者拉它,或者施加某种外力

耶鲁公开课 - 基础物理课程节选

If your plan is to accelerate a 3 kg mass with an acceleration of 2 meters per second, you better have a rope that can furnish that force and it can take the tension of 6 Newtons.

如果你想用 2 米每秒平方的加速度,去拉一个 3 千克的物体,那么你就需要一根能提供拉力的绳子,并且它能够承受 6 牛的张力

耶鲁公开课 - 基础物理课程节选