1....conducted a series of tests on mice to ascertain the effects of stress on the rodents.
ascertain确定
Through doing this, the teacher will be able to ascertain the extent to which the child understands what he is reading
这样一来,老师就能确定孩子们对他所读的内容理解多少了 。
2.This caused a hair-colouring pigment in the mice to go into overdrive as a reaction to the stress and deplete colour-regenerating stem cells.
deplete耗尽
They fired in long bursts, which depleted their ammunition
他们长时间开火,耗尽了弹药 。