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

VOA: special.2009.08.06

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

I have got to put that in because that is a repulsive energy and that is going to decrease the energy of the system.

我必须要说清楚,因为这是一个排斥能,这将要减少这一系统的能量。

麻省理工公开课 - 固态化学导论课程节选

He says a decrease in the use of salt and unhealthful fats probably also helped.

VOA: special.2011.02.15

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

And studies have found that it helps protect against a decrease in mental ability.

VOA: special.2009.03.24

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

"Women who had their ovaries removed had a decrease in the risk of breast cancer, a decrease in the risk of ovarian cancer and,in addition,they were less likely to die of breast cancer, less likely to die of ovarian cancer and also had an improvement in their overall survival."

VOA: special.2010.09.22

The expanding U.S.advisory role coincides with a decrease in combat operations in the months before U.S.troops are due to withdraw by the end of December 2011.

VOA: standard.2009.07.28

Reports indicate there's a decrease in the risk of in-hospital deaths.

VOA: standard.2010.03.07

In other new research, a study has found that circumcision does not decrease the risk that H.I.V.positive men will infect women.

VOA: special.2009.07.29

The researchers found a major decrease in unwanted chemicals by preparing the meat with spice and herb marinades.

VOA: special.2009.05.19

The electronics industry is hoping a new crop of products will help it recover from an eight percent decrease in sales last year.

VOA: special.2010.01.26

They found a major decrease in unwanted chemicals by preparing the meat with spice and herb marinades.

VOA: special.2010.06.01

It says there has been a major decrease in AIDS deaths in many countries as a result.

VOA: special.2010.03.10

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