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》

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。

youdao

There has been a decrease in traffic accidents.

交通事故减少了。

《新英汉大辞典》

In China,some farmers and researchers blame a decrease in pesticide use for an increase in pests unaffected by Bt.

VOA: special.2009.10.27

So, I've got ion pair formation, and I've got a huge decrease in energy because a donor is able to express that urge, an acceptor is able to express that urge.

所以我能得到形成的电子对，同时能量也大幅下降,因为失电子方要表达它的迫切，得电子方也要表达它的迫切。

麻省理工公开课 - 固态化学导论课程节选

Not only are we taking away an electron here, but we're also going to decrease shielding, so the electrons that are already in there are going to feel a higher z effective and will be pulling and the atom will be getting smaller.

这不只是因为我们拿走了一个电子，还因为我们这样做会减小屏蔽效应，这样留下的电子,将会感受到更大的有效核电量,也就会感受到更强的吸引力，使得原子变得更小。

麻省理工公开课 - 化学原理课程节选

Only 22% of them anticipate a decrease in hiring, down from 86% a year ago.

FORBES: The State of the CEO: Things Are Looking Up

Durable goods purchased dropped 1.7% in May, compared with a 0.3% decrease in April.

FORBES: Consumer Spending Hit Speedbump In May: Markets Responding With Resilience

In the years that followed, the state found an 88% decrease in horse theft.

FORBES: The Ethics Of Horsemeat