The park ranger always reminds visitors: make sure to put out the campfire before you sleep, it's the most important rule here.
🔊公园管理员总是提醒游客:**睡前务必熄灭营火**,这是这里最重要的规定。
🔗 固定搭配
put out a fire – 灭火(泛指熄灭各种火源)
safety precaution – 安全预防措施
🔄 同义词
extinguish the campfire (v. phrase) – 熄灭营火(更正式的说法)