A guardian; keeper.

保护者；看守员；守护人。

Head keeper of a prison.

典狱长。

A trustee.

受托人；保管人。

The chief officer of government in a college.

【英】大学校长。

Any of various officials in charge of something, as wild game, a port, etc.

主任；监督。

To guard or protect as a game warden.

警卫(渔猎区)。