on vacation同义词一定也是 on..

on vacation同义词一定也是 on.. vacation 同义词 in the vacation ；go on vacation ；on vacation 区别? go on vacation , on a vacation是什么意思 on vacation(翻译） on vacation 造句 on a vacation造句 be on vacation[翻译】 on vacation=( ) ( ) on vacation 和 for vacation的区别 in vacation,on vacation的区别 in vacation和on vacation的差别 应该用in vacation还是on vacation on vacation与for vacation的区别 on vacation和for vacation哪个对 Thanks for后面是doing吗?还有vacation前面的介词一定要是on吗?如上 go for one's vacation /on vacation/ take a vacation