Let off
先写下记得的内容，再查看解释。不要填写个人信息。
查看解释
'Let off' has two primary meanings. First, it means choosing not to punish someone for breaking a rule, or giving them a milder penalty than standard regulations require. Second, it means causing fireworks, an explosive device, or a weapon to explode or discharge.
The teacher decided to let the class off without extra homework because everyone participated actively.