hand 与submit如何区别

at hand与on hand的区别 submit in his hand与with his hand区别 by hand 与 by the hand的区别 hand made 与homemade的区别? hand与head有什么区别? give out与hand out的区别 on the one hand 和 on one hand 区别是神马,那一个与on the other hand 连用 put your hand in your ear与put your hand on your ear区别? second hand books 与 used books什么区别? hand over 与 take over有什么区别? give out与hand out有何区别