[] () a situation where you gain less and less benefit or profit from sth, even though you spend more time or money on it 收益递减◆Our increased efforts were producing diminishing returns. 我们付出更多的努力却带来递减的收益。◆The law of diminishing returns applies to physical products: at some point unit cost increases with volume. 收益递减规律适用於有形产品：在某个时刻，单位成本随着产量的增加而增加。