This both releases the medicine and decreases the bacteria's population.

这样既释放了药物，又削减了细菌数量。

It's part of an effort to decrease the U.S. prison population.

这在一部分程度上是为了减少美国监狱人口。

Sixth grader Sydney Lane-Ryer said her team focused on the decreasing oyster population in the nearby Chesapeake Bay.

来自悉尼6年级的莱恩·雷耶尔表示她的团队重点关注切萨皮克湾附近急剧下降的牡蛎数量。

It suggests the species may be hard to find because its population has decreased, said a team of international scientists.

一个国际科学家团队表示，这表明该物种可能很难找到，因为它的数量已经太少。

But loss of their living space since the 1950s has decreased their population to only about 300 or 400 wild birds today.

但是自20世纪50年代以来它们的生存空间在减少，导致该野生鸟类数量降低至如今的三、四百只。

This both releases the medicine and decreases the bacteria’s population.

这既释放药物又减少细菌数量。

Meanwhile in Florida's Everglades, Burmese pythons, thought to have been released by pet owners, are the cause of decreasing populations of organisms.

与此同时， 在佛罗里达州的大沼泽地，缅甸蟒蛇被认为是宠物主人放生的，它们是生物数量减少的原因。

The use of DDT made eggshells very thin and decreased the population of raptors such as peregrine falcons and Cooper's hawks and red-tailed hawks.

卡伦：DDT 的使用使得蛋壳变得非常薄，从而减少了游隼、库珀鹰和红尾鹰等猛禽的数量。