turn off
turn on：中文意思打开;（使）感兴趣;（使）兴奋;发动。
例如：
（1）to turn sth on;to turn on sth：打开
例句：
She asked them why they hadn't turned the lights on.
翻译：她问他们为什么没有把灯打开。
I want to turn on the television.
翻译：我想打开电视。
Nothing happened when I tried to turn the engine on.
翻译：我试图启动引擎，但没有任何反应。
（2）to turn on sth;to turn sth on：换上一副…样子；摆出一副…样子
例句：I want to turn the doll on.
翻译：我想摆出洋娃娃的样子。
（3）to turn sb on;to turn on sb：引起…的兴趣
例句：I want to turn his brother on.
翻译：我想引起他哥哥的兴趣。