For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.
例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。
2
I knew I couldn't go back to my old job - instead, I went to college and got a degree in conservationlaw.
我知道自己无法再回去做原来的那份工作了——取而代之，我进入院校，拿到一个自然保护法的学位。
3
What Noether discovered is that whenever nature displays a continuous symmetry, a conservationlaw comes along for the ride, and vice versa.