/dɪˈkriːs/
no obj.
1- become smaller or fewer in size, amount, intensity, or degree减少, 减小, 减弱, 降低：
the population of the area has decreased radically.
该地区的人口急速下降。
1.1
- with obj. make smaller or fewer in size, amount, intensity, or degree使减少, 使减小, 使减弱, 使降低：
the aisles were decreased in height.
通道的高度减低了。
/ˈdiːkriːs/1
- an instance or example of becoming smaller or fewer减小, 减少：
a decrease in births.
出生人口减少。
1.1
- mass noun the action or process of becoming smaller or fewer减小（或减少）过程：
the rate of decrease became greater.
减慢的速率加大了。
短语
on the decrease
- becoming less common or widespread; decreasing在衰减中; 在减少中。
派生词
decreasingly
adverb选民们显得越来越不愿意支持该党了。
词源
late Middle English: from Old French decreis (noun)， decreistre (verb)， based on Latin decrescere, from de- 'down'+crescere 'grow'.