请问 one-tail hypothesis 和two-tail hypothesis 是什么 能具体讲讲意思和用法啊等等

请问 one-tail hypothesis 和two-tail hypothesis 是什么 能具体讲讲意思和用法啊等等 put one's tail between one's polling The one wearing a polling tail. there is only a one-man tail ahead怎样翻译 what has 6 legs,4 ears,and one tail? What has 6 legs,4 ears,and one tail? 请问One piece,one 改英语病句：it's tail is long than that one how is tail?the brown dog is than the yellow one.my fish is than . what has two head；six feet,one tail,and four ears? bust one's tail 出自so now all’s you gotta do is bust your tail to earn sixtybucks and you’re home free.---------《成长的烦恼》 Tail of TAIL是什么意思 Fairy tail tail是什么意思 tail是什么 Tail中文翻译 tail是什么