pre-cambrian period是什么意思，pre-cambrian period的翻译，pre-cambrian period音标、读音、用法和例句

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pre-cambrian period是什么意思，pre-cambrian period的翻译，pre-cambrian period音标、读音、用法和例句_菜篮子兴趣思朗文词典

pre-cambrian period

基本解释

专业释义

地球科学