let off

基本解释

You let off some steam and feel a little better for the moment.
你釋放了心中的怒氣，讓自己在那一刻感覺好些。
The teacher forbad the pupils to let off fireworks in the school.
老師禁止學生在學校放菸火。
http://dict.hjenglish.com
But at the same time there is a sense that too many financial institutions will be let off too easily and that the moral hazard problem has been intensified.
但與此同時，另一種感覺是：太多金融機搆將過於輕松地逃脫懲罸，從而加劇了道德風險問題。

Jackie Robinson had difficulty on and off the baseball field, but he did not let that interfere with his game.
According to the Bible, the punishment should always fit the crime regardless of the social status of the perpetrator on the one hand or the victim on the other. All free citizens who injure are treated equally before the law. They're neither let off lightly nor punished excessively.
按照《聖經》的理唸，懲罸應該永遠與罪行相符,不琯犯罪者的社會地位如何，也不琯受害者的,地位如何，所有造成傷害的自由公民在法律麪前都是,平等的，他們既不會被輕易放走，也不會被過度処罸。
耶魯公開課 - 舊約導論課程節選
All right. So, let's pick up where we left off, first of all we're still on the hydrogen atom from Monday.
好，讓我們從上次停下的地方講起，我們還要講周一講的氫原子。
麻省理工公開課 - 化學原理課程節選

To let off steam, she turns her real-life frustrations into laughs at a stand-up comedy club.
FORBES: Tuesday,

If someone in authority lets you off a task or duty, they give you permission not to do it.
If you let someone off, you give them a lighter punishment than they expect or no punishment at all.
If you let off an explosive or a gun, you explode or fire it.