他当老师压根儿就不称职。

As a teacher, he's a disaster.

《牛津词典》

从他当老师是获得的经验，鲍勃辅导他女儿的功课。

Drawing from his experience as a teacher, Bob helped his daughter with her homework..

youdao

当加拿大少年瑞安六岁的时候，他的老师告诉他，在非洲的许多地方没有干净的水。

When Canadian teenager Ryan was six years old, his teacher told him that in many parts of Africa, there was no clean water.

youdao

So, someone says I didn't understand what he was talking about at the end of the last lecture when he was doing the Bohr model.

所以，有人会说，我不理解老师,在上节课末尾说的内容,当他在做玻尔模型的时候。

麻省理工公开课 - 固态化学导论课程节选

When Shelly says he's the harshest grader on campus, he isn't lying.

当薛立说他是全校评级最严苛的老师时，他没有撒谎。

耶鲁公开课 - 死亡课程节选