You can't go to school in this country, and in many countries, until you've had your prescribed set of vaccinations.

在我国,接种规定的疫苗之前,许多国家也一样,你都不能去上学

耶鲁公开课 - 生物医学工程探索课程节选

By Spring Break he'd gotten sufficiently sick that his doctor basically said, "You can't continue in school anymore.

春假的时候，他病得十分严重,他的医生直截了当地说，“你不能再上学了。

耶鲁公开课 - 死亡课程节选