He didn't register for a proper course.

他没有选择合适的课程。

youdao

To turn from a correct or proper course; deflect.

'偏离'。''离开某一正确的或合适的路线；偏斜。

youdao

To start a proper course of treatment you'll need to get an accurate diagnosis of your condition first.

在开始使用一个合适的治疗手段之前，你得必须准确的掌握你自己的所处的状况。

youdao

We'll get into the proper or at least more systematic business of the course when we turn to hermeneutics next week.

下周我们讲到阐释学的时候,将会真正地或者说更系统地对这门课程进行讲解。

耶鲁公开课 - 文学理论导论课程节选

Coolly maintaining our deterrent and not over-reacting to hyperbole is the proper course of action.

CNN: Kim Jong Un is not crazy

Under the imperial honour code, suicide would have been the proper course.

ECONOMIST: A god dethroned

Lord Justice Kay, giving the court's reasons for overturning her conviction said the Crown had taken the "right and proper course" not to seek a retrial.

BBC: Judges explain baby death ruling