They only begin arguing and pestering when they detect uncertainty or guilt, and sense that their parents can be pushed to give them what they want, if they just keep at it.
只有当孩子们发现家长犹豫不决或是感到内疚而且意识到只要坚持下去父母就会答应他们的要求时，他们才会和家长争吵，才会纠缠不休。
What we will begin to see is scientists arguing for the use of genetics to breed out certain behavioral traits from humanity.
我们开始看到，科学家们为遗传技术辩护的理由是，可以清除人类身上某些行为缺陷。
They begin to arguing and make spite ones.
他们开始吵架并开始相互攻击。
They begin to arguing and make spite ones.
他们开始吵架并开始相互攻击。
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