确保一定在你离开教室之前关灯的翻译：Ensure before you leave the classroom must be to turn off the lights 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Ensure a certain turn off the lights before you leave the classroom

Ensure before you leave the classroom must be to turn off the lights

Guarantees leaves in front of the classroom in you turns certainly off the lamp

Ensure that you leave the classroom before the lights

Ensure before you leave the classroom must be to turn off the lights