Ar 词形变化 Ars 复数 释义与例句 n. 1. Alternative letter-case form of ar. 词汇关系 名词 同义词 2 are argon 上位词 2 inert gas noble gas 整体词 2 air hectare 相关短语 AR theory AR pupil AR pupils Ar Rayyan attainable region theory Al Rayyan oh ar Jay Ar