discover ,find ,find out ,look for 的区别

discover,find out,look for, find的区别? find out,discover,look for,find,invent之间的区别 discover ,find ,find out ,look for 的区别 find,find out,look for,discover的用法 find.find out.discover.look for之间的区别.举例说明.速求 find ,find out,look for,的区别 find out,look for,find的区别 find;find out;observe;discover的区别 discover,find,find out,invent的区别 Discover、Invent、Find、Find out 的区别 discover,find和find out的区别 find out的近义词是discover; look for；see