用法:
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.

用法:
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?

• in the market(on the market)
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