Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
But I might not.
但也许不去。
It is not polite to eavesdrop on the conversation of other people.
偷听他人说话是很不礼貌的。
Could you tell me your secret for a long, happy life?
你能告诉我长时间地过着快乐的生活的秘诀吗？