Most American girls at the beginning of the twentieth century were taught to sit quietly and speak softly.

VOA: special.2010.05.26

It's not about necessarily... You can't just sit quietly, in silence.

这并非有关。,不能只是坐在那里，默不作声。

普林斯顿公开课 - 人性课程节选

I expect you to sit there quietly respect your neighbor I expect you to contribute to the learning environment.

我期待你们安静地坐在这里，尊重周围的同学,我期待你们都对学习环境有所贡献。

麻省理工公开课 - 固态化学导论课程节选