You can't take land that everybody is sharing in common.

你不能掠夺大家共同使用的公用土地。

耶鲁公开课 - 公正课程节选

and there's one public community rest room for girls and guys.

有一个男女公用的洗手间。

住宿环境怎样？ - SpeakingMax英语口语达人

So, that's his gift to us: the Lewis structure, and the idea that you could share electrons and form a covalent bond.

这就Lewis给我们的礼物，Lewis结构，你能够通过公用电子,形成共价键。

麻省理工公开课 - 固态化学导论课程节选