debasement of quality;
debase the value of the dollar 使美元贬值
debase onself for money 为金钱而卑躬屈膝
guarantee
yield 产出， That apple tree yields plenty of apples.
让步， They yielded the fortress to the enemy.
产量， high yields the yield per hectare
yield 指“在压力、武力或恳求下让步”, 如:
yield to demands
对要求让步。
submit 强调“放弃抗拒、屈服于某一势力、权力或意志”, 如:
He was losing the fight but he would not submit.
他战败了, 但不屈服。
