The singer was led off the stage by the maestro.

上海龙凤1314　　歌唱家由那位著名的指挥领着离开了舞台。

　　Off campus, they faced hostility.

上海龙凤1314　　在校园之外，他们遭人敌意。

　　The plane took off and ascended steadily until it was out of sight.

　　飞机起飞之后平稳地逐渐升空直到消失在视野之外。

上海龙凤1314　　He forgot to turn off the gas torch when he left.

　　他离开的.时候忘记关掉气焊焊炬了。

　　Please switch the lights off as you leave.

上海龙凤1314　　你离开的时候请把灯关了。

　　Make sure the central heating is off.

上海龙凤1314　　集中供暖设备一定要关掉。