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

But, I would suggest to you, Salinger is trying to balance something very carefully, that relates back to this question of doctrine versus syncretism in the religious sphere of the novel, in the religious thematic material of the novel.

但是我提醒你们，Salinger，小心的平衡某个东西,那和之前的问题有关,关于小说里宗教范畴里的教条和宗教融合的比较，也是在小说里的宗教主题材料里的比较。

耶鲁公开课 - 1945年后的美国小说课程节选