You need insurance on both parents because both parents are contributing to the success of the children.

之所以父母双方都要购买保险,是因为父母双方都对,孩子的成长起着重要的作用

耶鲁公开课 - 金融市场课程节选

As always with philosophy, there's more complicated versions of dualism where maybe the interaction doesn't work both ways, but let's just limit ourselves to good, old-fashioned, two-way interactionist dualism.

但由于我们在说的是哲学,二元论还持有更为复杂的观点,例如,交互作用对双方都不起作用,但就让我们限制在一个范围内较好,保守的,双向互动二元论观点

耶鲁公开课 - 死亡课程节选

The moral is that reciprocity is friendship and so good, all to the good, but as I say there's a moment of suspense in the expectation at the point in the text when we expect a moral but we don't know what the moral is going to be.

寓意是，相互关爱就是友谊，它如此美好，对双方都有好处，但正如我所说，也有那么一刻，期望面临悬念,在当我们期待一个寓意,却不知道那个寓意将是什么的时候。

耶鲁公开课 - 文学理论导论课程节选