The buttons above the Numbers will decrease a number while the buttons below will increase a number.

上述数字的按钮将减少一个数字，而下面的按钮将增加一个数字。

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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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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

Makowsky from Townson University and Thomas Stratmann from George Mason University argue that the increase in the number of traffic tickets leads to a decrease in the number of accidents.

FORBES: It's Not Your Imagination. Recessions Do Lead to More Traffic Tickets

Over 90% of Family Medicine residents will remain in primary care, although their scope continues to decrease due to a number of factors and the addition of new fellowships for Family Doctors (sports medicine, obstetrics, adolescent medicine, hospitalist training, etc.).

FORBES: Doctor Shortage Isn't Going Away

The primary driver of this increase was a decision taken by the company to decrease the number of articles a non-paying user could read to 10 from 20.

FORBES: NYT's Swelling Digital Subscribers Take Stock To $8.20