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。

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Instead, the expansion of agriculture and a steady decrease in the number of male farmworkers combined to cause the industry to hire more women in the postwar years.

相反，农业的扩张和男性农场工人数量的持续下降，导致了该行业在战后雇用了更多的女性。

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In Spain and Portugal there has been a decrease in the number of young people out of work.

在西班牙和葡萄牙，失业青年人数已经有所下降。

《柯林斯英汉双解大词典》

She says one possibility is a decrease in the number of school nurses during the period they studied.

VOA: special.2009.08.06

The return, of course, in any given time period is the percentage increase in the portfolio; or, it could be a negative number, it could be a decrease.

当然了，收益率是一定时间内,投资组合的增长率;,也可能是一个负数，表示负增长。

耶鲁公开课 - 金融市场课程节选

The Millennium Development Goals for two thousand fifteen call for a fifty percent decrease in the number of people without safe drinking water and basic sanitation.

VOA: special.2010.04.05

Individual insurance became significantly more expensive and there was no significant decrease in the number of uninsured.

WSJ: Peter Suderman: The Lesson of State Health-Care Reforms

The study, called SEAS, did show a significant decrease in the number of heart attacks and strokes.

FORBES: Another Blow For Merck And Schering

However, the figures show a small decrease in the number of people cycling compared to data gathered the previous year.

BBC: Cambridge beats Oxford in DfT cycling survey