are under stress的意思|示意

That is, such brisk drops in temperature encourage yeasts to produce acetaldehyde because they are under stress. Something entirely different happens if temperature is caused to drop gradually.

这种急剧的温度降低会促使酵母产生乙醛，而如果在渐变的温度条件下，情况则完全不同。

Calcium builds strong bones, which are less likely to break under the stress and strain of heavy activity.

钙用于建立强壮的骨骼，使它不会在重压和剧烈活动时断裂。

When we are under stress our bodies tend to tense up.

当我们处在压力之下时，我们的身体往往会绷紧。

They are under too much stress counselling needy students.

他们为有需求的学生提供咨询服务，承担了太大的压力。

To most people, this is the familiar Africa, a place of large families and high fertility, a continent in which societies are under extreme stress and where the young massively outnumber the old.

这差不多就是大多数人眼中的非洲：一个家庭成员众多，生育率居高不下的地方，一片有着高压社会，年轻人口大大超过老年人口的大陆。

When a person is running they are putting their body under stress.

当人们奔跑时，他们的肌体便处于紧张状态。