let off

英 [let ɒf]

美 [let ɔːf]

准许…不必做（或不必工作）; 对…宽大处理; 使（炸药等）爆炸; 开（枪、炮等）

柯林斯词典

PHRASAL VERB 准许…不必做（或不必工作）
If someone in authorityletsyouoffa task or duty, they give you permission not to do it.
1. 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。
2. 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。
PHRASAL VERB 对…宽大处理
If youletsomeoneoff, you give them a lighter punishment than they expect or no punishment at all.
1. 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。
2. 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。
PHRASAL VERB 使（炸药等）爆炸；开（枪、炮等）
If youlet offan explosive or a gun, you explode or fire it.
1. 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。

verb

grant exemption or release to
1. Please excuse me from this class
Synonym:excuserelieveexempt

They hope this will let off steam and help prevent a dramatic bursting of a property bubble.
他们希望这将起到釜底抽薪的作用，帮助防止地产行业出现戏剧性的泡沫破裂。
Well, I must say television's just a passive way of let off steam.
噢，我得说电视只是消耗精力的一种消极方式。
They can let off steam in pubs where nobody knows them.
他们可以在酒店里纵情宣泄，那里没有人认识他们。
He believes that if he works all day he should be let off domestic chores.
他认为如果他整天工作，就应免掉他的家务劳动。
Don't let off fireworks near the house.
不要在靠近房屋的地方放焰火。
US businesses have been let off lightly.
美国企业暂且逃过了一劫。
This train stops to let off passengers on signal.
这列火车按信号停车让旅客下车。
A second rocket is then let off to make sure everyone knows the bulls are loose in the street.
第二个火箭随后放出，以确保每个人都知道公牛队已开始在街上奔跑了。
I walk while draw, when I am moved, I ever do not let off this primitive impulsion.
我边走边画，感动了我时，我从不放过这个原始冲动。
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。