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Triacontanol causes promotional effects on the decrease in number of empty grains in hybrid rice.

三十烷醇对降低杂交稻空壳粒也有效果，对千粒重无明显影响。

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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

Recent conflicts and rural to urban migration that reduced the population of the region and changes in ways of life have caused a sharp decrease in the number of performers, resulting in the loss of many archaic styles and genres of solo singing.

UNESCO: CULTURE

This is reflected in the decrease in the number of households owning with a mortgage and also in the increase in the number of households renting their accommodation, it said.

BBC: File photo of to let signs