不论情况如何，父母应该知道做什么才能达到最佳效果。
Whatever the circumstances, parents are supposed to know what to do for the best.
这样严格的父母应该知道收益递减规律。
Such strict parents should know the law of diminishing returns (收益递减).
父母应该知道，很多时候他们会在很多方面影响孩子。
Parents should know that very often they influence their children in many ways.
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