From what Rooney said, the decline of profits is mainly due to large amount decrease of production in August because of the holiday period.

从鲁尼所说可看出，利润的下降主要是由于八月份的生产数量减少，因为假期的缘故。

youdao

People should decrease the amount of fat they eat.

人们应减少脂肪的摄入量。

《牛津词典》

The land started to get drier, which in turn caused a huge decrease in the amount of vegetation because vegetation doesn't grow as well in dry soil, right?

土地开始变得干燥，这反过来又导致了植被数量的大量减少，因为植被在干燥的土壤里无法生长得很好，对吧？

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The decrease in the amount of dopamine can result in one or more of the general signs of Parkinson's.

VOA: special.2009.02.03

The decrease in the amount of dopamine can result in one or more general signs of Parkinson's disease.

VOA: special.2009.04.07

It aims to decrease the amount of added sugar from many products that children eat.

VOA: special.2010.06.07

Regulators say holding back a small amount of customer cash would decrease the amount of capital that firms would have to hold in reserve and compare the idea to a minimum account balance required by banks.

WSJ: U.S. Sets Money-Market Plan

But dimebon didn't decrease the amount of amyloid produced by mouse brain cells in a dish.

FORBES: Magazine Article

Carbon dioxide emissions decrease the amount of available oxygen in water in two ways.

FORBES: Carbon Emissions Threaten The Fishing Industry By Shrinking Fish Sizes