decrease
/dɪˈkri:s; dɪ`kris/ v[I, Tn]
(cause sth to) become smaller or fewer; diminish （使某物）变小或变少; 减少
Student numbers have decreased by 500. 学生人数减少了500名.
Interest in the sport is decreasing. 人们对此项运动的兴趣已逐渐淡薄.
decrease / ˈdi:kri:s; `dikris/ n
1 ~ (in sth)
(a) [U] decreasing; reduction 减少; 降低
some decrease in the crime rate 犯罪率的少许降低.
(b) [C] amount by which sth decreases 减少的量
a decrease of 3% in the rate of inflation 通货膨胀率降低3%
There has been a decrease in imports. 进口货物有所减少.
2 (idm 习语) on the `decrease decreasing 在减少
Is crime on the decrease? 犯罪案件是否在减少?