let off

基本解释

You let off some steam and feel a little better for the moment.
你释放了心中的怒气，让自己在那一刻感觉好些。
The teacher forbad the pupils to let off fireworks in the school.
老师禁止学生在学校放烟火。
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.
但与此同时，另一种感觉是：太多金融机构将过于轻松地逃脱惩罚，从而加剧了道德风险问题。

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《圣经》的理念，惩罚应该永远与罪行相符,不管犯罪者的社会地位如何，也不管受害者的,地位如何，所有造成伤害的自由公民在法律面前都是,平等的，他们既不会被轻易放走，也不会被过度处罚。
耶鲁公开课 - 旧约导论课程节选
All right. So, let's pick up where we left off, first of all we're still on the hydrogen atom from Monday.
好，让我们从上次停下的地方讲起，我们还要讲周一讲的氢原子。
麻省理工公开课 - 化学原理课程节选

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.