let off

放（炮、烟火等）； 免罚； 宽恕

Let me help you off with your coat.(我来帮你脱大衣吧。)

Jane: Come on. I think you need to let off some steam.(简：来吧，我觉得你应该把愤怒发泄出来。)

Yet what the industry and its defenders demand is, of course, precisely that it be let off the hook for the damage it causes.(然而，水力压裂行业及其捍卫者所要求的，却正是对自身造成的损失一推了之。)

The mother said she would let off her son washing the dishes if he could finish his assignment before supper.(母亲说如果儿子能在晚饭前完成作业，她就不让他洗碗。)

"It's entirely possible that people can look at all those stories and in some emotional way let off steam," said Mr. Hackett of people.(“人们完全有可能通过观看这些故事，在某种情感层面上发泄自己，”《人物》杂志的哈克特先生说。)

But most of the time, arguments are just a way to let off steam when parents have a bad day, don't feel well, or are under a lot of stress - kind of like when you argue with them.(但是大多时候争吵只是一种发泄方式，当父母过了糟糕的一天，感觉不好的一天或者压力很大的一天，就像你和他们争吵时的原因差不多。)

Then he chased the thief, frightening him at the same time, "Stop or I will let off the gun!"(然后他追赶盗贼，一边还吓唬他：“停住！不然我开枪了！”！)

We always let off fireworks.(我们总是会放烟花。)

Why - he was standing over the whey-tub to let off the whey, and the shade of his face came upon the wall behind, close to Izz, who was standing there filling a VAT.(我是说——他站在装奶清的桶的旁边撇奶清，他的脸的影子落在身后的墙壁上，正好在伊茨的旁边。)

Our tutor tried to dispel my illusion with sound advice and a resounding slap: "you're crying to go to school now, you'll have to cry a lot more to be let off later on."(我们的家庭老师试图以一句睿智的忠告再加一记响亮的耳光来驱散我的幻想：“你现在哭着闹着要进学堂，将来恐怕你更要哭着闹着离开那呢！”)

verb

1. grant exemption or release to

e.g. Please excuse me from this class

Synonym: excuserelieveexempt

1. 准许…不必做（或不必工作）
If someone in authority lets you off a task or duty, they give you permission not to do it.

e.g. The theatre management kindly let me off a couple of performances to go to Yorkshire...
剧院领导很体谅地同意我休演几场抽身到约克郡去。
e.g. In those days they didn't let you off work to go home very often.
在当时，他们并不经常准许请假回家。

2. 对…宽大处理
If you let someone off, you give them a lighter punishment than they expect or no punishment at all.

let off的解释

e.g. Because he was a Christian, the judge let him off...
由于他是基督徒，法官便对他从轻发落。
e.g. When police realised who he was, they asked for an autograph and let him off with a warning.
警察知道他是谁后，便向他要了签名，然后只给了他个警告就放他走了。

3. 使（炸药等）爆炸；开（枪、炮等）
If you let off an explosive or a gun, you explode or fire it.

e.g. A resident of his neighbourhood had let off fireworks to celebrate the Revolution.
他家附近的一个居民燃放了烟花庆祝革命胜利。