先决

Sound sleep presupposes a mind at ease.

充足睡眠需以心情轻松为先决条件。

It is a prerequisite of entry to the profession that you pass the exams.

做这一行先决条件要通过了有关考试。

Success presupposes diligence.

勤先决条件。

No preconditions should be imposed.

不应有[强加]先决条件。