Methane series
烷系
🧩 词语组成解析
methane
['meθein]
n. <化>甲烷，沼气;
🗣️ 情景例句
Me?
我？
I'm sorry to have kept you waiting.
很抱歉，让你久等了。[分词作状语]
Don't you think we should add a sentence here like this?
难道你不觉得我们应该在这儿加上一句话？