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

Because you are ill, " because you are not focusing enough on your health."

因为你病了，因为你没有注重健康“

哈佛公开课 - 幸福课课程节选

Or perhaps it means because you're sick, you can't hold your job down.

或许它意味着因为你病了，所以无法工作。

耶鲁公开课 - 死亡课程节选

And there was a feeling that this could protect you against the disease.

这会使你觉得受到了保护不会得这种病

耶鲁公开课 - 生物医学工程探索课程节选

So if you got infected with smallpox, you got the disease.

如果你感染了天花病毒,就会得这种病

耶鲁公开课 - 生物医学工程探索课程节选