英语词汇has been conducted before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	has been conducted before
释义	before — 前 • 之前 • 以前 • 先前 • 前来 • 在未 adv • 先头 • 前儿 • 早先 has-been — 过气 before conj — 在之前 conj before prep — 先于 prep
随便看	tolerance percent tolerance principle tolerance problem tolerance profile tolerance provided tolerance range tolerance range around tolerance rate tolerance report tolerance requirements tolerances tolerances according to tolerances are exceeded tolerances for tolerances for dimensions tolerances have been established tolerance specification tolerances provide tolerance stability tolerance system tolerance tables tolerance time tolerance to heat tolerance towards tolerance towards different

英汉双解词典包含2273206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。

before —