英语词汇classes of certificate of competency怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	classes of certificate of competency
释义	classes of certificate of competency 简明释义适任证书等级专业释义 1 交通运输工程适任证书等级 2 地球科学适任证书等级
随便看	drop by dropping character dropping characteristic dropping charactersitic dropping condition rule dropping corrosion test dropping current strength dropping cut slice drop dead dropping device drop down dropping dryer dropping drying plant dropping electrode dropping equipment drop experiment dropping field dropping fire dropping-fishing truck dropping flare dropping fraction dropping funnel dropping glass dropping ground drop head

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。