動(dòng)詞 let off:

1. grant exemption or release to
   同義詞：excuse, relieve, exempt

1. The janitor let off some steam because the pressure was too high.
   由于壓力過(guò)高，火爐工放掉了一些蒸氣。
2. The boys were letting off fireworks.
   男孩子在放煙火。
3. We've been let off school today because our teacher is ill.
   今天學(xué)校放假，因?yàn)槲覀兊睦蠋煵×恕?/div>
4. She was let off with a fine instead of being sent to prison.
   沒(méi)讓她入獄，而是罰款了事。