英语词汇pre-Cambrian, geological period before c. 540m years ago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	pre-Cambrian, geological period before c. 540m years ago
释义	pre-Cambrian, geological period before c. 540m years ago— 前寒武纪
随便看	first segment first seised first select first selection first select the category first semester first semester 2012 first semester in 2012 first semester of 2012 first sensation first sense first sentence of paragraph first sequence first series first series-production first serve first serve basis first served basis first service first session first session of the Conference first set forth first setting first settlement first settlers

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。

pre-Cambrian, geological period before c. 540m years ago—