OFF和ON在机器开关上，一般ON是开（机）的意思；OFF是关（机）的意思，当然有些汽车开关上也标注有比如大灯开关。
1、ON：英 [ɒn] 美 [ɑn]
prep.（表示方向）向； 对；在…上；
adv.上； 向前，下去；
adj.活动着的情况，状态；
例句：Perhaps it would be best not to see much of you from now on
也许从现在起我们最好少见面。
The market square is a riot of colour and animation from early on in the morning
从大清早起这个市集广场就色彩缤纷，生机勃勃。
2、OFF：英 [ɒf] 美 [ɔf]
prep.从…落下； 离开； 下班
adv.离开； 距，离； 被取消； 下班
adj.不新鲜的； 不礼貌；
例句：She gave a hurried wave and set off across the grass
她匆匆地挥了挥手便穿过草地离开了。
She was off again. Last year she had been to Kenya. This year it was Goa
她又走了，去年去了肯尼亚，今年则是果阿。
扩展资料：
一、OFF
1、He took his feet off the desk
他把脚从桌上移开。
2、Don't try to get on or off a moving train!
火车运行时请勿上下车！
3、Locking up men does nothing more than keep them off the streets
把这些人关起来只是做到了不让他们上街而已。
4、The boat was anchored off the northern coast of the peninsula
这艘船停泊在离该半岛北部海岸不远的地方。
二、ON
1、He is sitting beside her on the sofa
他挨着她坐在沙发上。
2、I admired the peeling paint on the ceiling
我“观赏”着天花板上正在剥落的油漆。
3、He got his winter jacket from the closet and dropped it on the sofa
他从衣橱里取出冬天穿的夹克，把它扔到沙发上。
4、He continued to lie on his back and look at clouds
他仍旧仰卧着，望着天上的云彩。
