大学教授既要教学又要从事研究工作。

University professors both teach and undertake research.

《牛津词典》

既要花力气又要有心计才能维持生存。

It took energy and cunning just to survive.

《牛津词典》

妇女经常得两头兼顾，既要工作又要照管家庭。

Women very often have to juggle work with their family commitments.

《牛津词典》

So when you go ahead and draw these on your problem-sets or on your exams, it's a good idea to put these dashed lines in, both for you and for people reading it to see exactly where your molecular orbitals are coming from.

所以当你在做课后题,或者考试的时候要画这些图时，最好把这些虚线放进去，既方便你自己也方便别人知道,这些分子轨道是从哪里来的。

麻省理工公开课 - 化学原理课程节选

On the other hand, if somebody says, "Somebody call the police," well, I got things to do and so diffusion of responsibility explains both when we're willing to do terrible things and also when we're willing to help people who are in trouble.

但是如果有人叫，“来人，快报警”,“我有事要忙”,责任分散,既能解释我们在什么情况下会干坏事,也能解释我们在什么情况下会帮别人。

耶鲁公开课 - 心理学导论课程节选