当你进屋，轻轻按下电灯开关，而灯亮了。

When you come into a room, you flip the light switch, and the light goes on.

youdao

当你进屋，轻轻按下电灯开关，而灯亮了。

When you come into a room, you flip the light switch, and the light goes on.

youdao