为什么是 on the plate in the dish?on 和 in 这俩介词的根本用法怎么区分?

in adv. or toward the inside of
come in smash in the door
on [ɔn, ɔ:n, ən, n] adj.
1. in operation or operational
left the oven on the switch is in the on position
2. (of events) planned or scheduled
the picnic is on, rain or shine we have nothing on for Friday night
adv.
1. with a forward motion
we drove along admiring the view the horse trotted along at a steady pace the circus traveled on to the next city move along march on
2. indicates continuity or persistence or concentration
his spirit lives on shall I read on?
我的理IN（中文音嗯） ON（中文音安）区别I O 英语字母排序是有方位方向的,N是一道门,我们汉语古代写字是从右至左（写字人面对的,）,方向向东,NO没有, ON O在前进的方向中,又是园的,想想不就明白了,IN I一个小东西,进入门里了,
延伸：at [强æt, 弱ət] /æ/一个多稳当的图形,口形又大又宽,像不像一个东西稳稳当当放在一个地方（点）,etc.
笑谈,乐乐

on的意思是在......上面， 而in的意思是在.........里面

on是指在物体的表面，in是在里面。on the plate 和in the dish都表示在盘子里，但在这里意思一样。

on一般可以想成在某物体的表面，in 的话要更深入或在内部