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1·There has been some decrease in military spending this year.

今年的军费开支有所减少。《牛津词典》

2·Reactivity is an increase in negative emotions or a decrease in positive emotions.

情绪反应是指消极情绪的增加或积极情绪的减少。

3·There has been a decrease in traffic accidents.

交通事故减少了。《新英汉大辞典》

4·Last year there was a 20% decrease in his earnings.

去年他的收入减少了20%。《新英汉大辞典》

5·There could be a slight decrease in his weight but he eats too much.

他的体重可能略有下降，但他还是吃很多。

6·A decrease in face-to-face social contact can precipitate depression.

面对面社交接触的减少会导致抑郁。

7·The economic problems have certainly been one reason for the decrease in champagne sales.

经济问题当然是香槟销量下降的原因之一。

8·The destruction of coral through land use activities would cause a decrease in the number of predators that feed on Acanthaster larvae.

通过土地利用活动对珊瑚的破坏会导致以棘星幼虫为食的捕食者数量减少。

9·The biggest change has been the decrease in sales since the great boom years in 1980s when champagne production and sales reached record levels.

最大的变化是，自20世纪80年代香槟的生产和销售达到创纪录水平的大繁荣时期后，销量一直在下降。

10·Schools that show a decrease in deliberate destruction of property can receive the amount of money that would be spent on repairs and replacements.

如果校内故意破坏公物的行为减少，那么学校就可以获得用于维修和更换物品的资金。