And Sue wore a beautiful white dress with a huge steel-spring bustle in the back.

VOA: special.2009.11.28

We go back to the spring and we want to learn something about the spring.

我们回到弹簧的问题上来,我们要学习一些关于弹簧的知识

耶鲁公开课 - 基础物理课程节选

I tie a spring to my back and I anchor it to the wall and see how much the spring stretches before the two forces balance.

我把弹簧一端系在背后,另一端固定在墙上,观察两个力平衡时弹簧的伸长量

耶鲁公开课 - 基础物理课程节选

Now, we go back to the spring.

现在,回到弹簧的问题上

耶鲁公开课 - 基础物理课程节选