People are frantically looking for fun fixes, but that’s the law of diminishing returns.

人们疯狂地寻欢作乐，但这就是报酬递减的规律。

The law of diminishing returns as it relates to layering.

收益递减法与分层蜡有关联之处.

I might know the idea of opportunity cost, but I didn't know the law of diminishing returns.

我也许明白“机会成本”这个概念，但是我不懂收益递减法则。