Perfluorocarbon
全氟化碳
🗣️ 情景例句
If you don't ... can I ... can I adopt the dog?
要是你们找不到狗的主人，我可否…… 我可否收养这只狗?
We'll exchange presents.
我们要交换礼物。
Those women are very hard-working.
那些姑娘很勤快。