Pre-cambrian
先寒武纪前
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
a. 寒武纪的\\nn. 寒武纪, 威尔士人, 寒武系
🗣️ 情景例句
Come on in!
进来！
Why are you so busy?
你为什么这样忙碌？
We'll have to get this contract typed as soon as possible.
我们得尽快把契约书打出来。