find,find out,look for,discover的用法

find,find out,look for,discover的用法 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 out的近义词是discover; look for；see look for/find和find out的用法 look for,find,find out 的区别和用法 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