umpire,arbiter和referee的区别?

umpire,arbiter和referee的区别? referee和arbiter的区别? refer refer to和refer to...as...的区别 wax 和vinegar,referee和umpire,subway和tube,vocation和career麻烦分析一下这四组词的区别. refer to和look up的区别 refer to 和look up 什么区别. refer to 和 turn to 有重合的意思吗? 写出下面单词的过去式和分词形式controloccur refer refer to与look up的区别和用法 例句 问forbid和refer to 的用法最好给出例句 consult with 和 refer to 有什么差别? refer to refer to refer to Umpire/arbitrator/referee/judge 「裁判」的不同? pls refer to attachment 和 pls refer to attached.这里attachment和attached不是不同性质的两个单词吗,为什么翻译出来都是附件（名词）? 求supply,fly,trafic,picnic,plan,refer,regret,ban的过去式和过去分词