Hexafluoroethane
[化] 六氟乙烷
🗣️ 情景例句
How well do I speak English?
我的英文说得怎样？
I played in the yard this afternoon.
我今天下午在庭院玩。
Together we repeated and repeated words and sentences.
我们一道反反复复地说词语和句子。