离开教室时，我们永远不要忘记关灯。
We should never forget to turn off the lights when we leave the classrooms.
他曾再三叮嘱我在离开时一定要先关灯。
He told me once again to be sure to put out the light before leaving.
你离开时请关灯好吗？
他说我离开时从不记得关灯。
离开房间时记得关灯。
离开房间时关灯。在房间内使用节能灯。
Turn off the lights when you leave a room. Use fluorescent bulbs in your room.
离开教室时，别忘记关灯。我不记得以前见过他了。
When you leave the classroom, don't forget to turn off the lights.
多数人离开自家房间时都会本能关灯。
Most people instinctively turn off the light as they leave a room at home.
当我离开房间时，我忘记关灯了。
当你离开时，请记住关灯。
当你离开时，请记住关灯。
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