Perchlorethane
[化] 全氯乙烷
🗣️ 情景例句
My folks are giving me a little graduation party.
我的亲人要为我办一个小小的毕业派对。
I'm glad to hear about your promotion.
我很高兴得知你升了职。
Where do the twins sit?
双胞胎坐在哪里？