on:
prep. 在……之上向，朝关于I put a portrait on the white wall.
我在白色的墙上挂了一幅肖像。
turn on:
v. 打开发动取决于使兴奋攻击
I want to turn on the television.
我想打开电视机。
He turned on his heel and left the room .他转过身去，离开了房间。
The talk turned on the advantages of measles .话题转到了出麻疹的好处。
He could turn on the harps of the blessed .他能召来天使的竖琴为他奏乐。
Ina reaches up and turn on the bed lamp .艾娜一伸手扭亮了床灯。
She turned on the radio with a futile gesture .她百无聊赖地打开了收音机。
