Fluorocarbon
[建] 碳氟化合物
🗣️ 情景例句
Are you in a fraternity?
你在兄弟会吗？
He's known me for over ten years.
他认识我超过10年的时间了。
Recently, one of Jeremy's closest friends asked him to make a speech at a wedding reception.
最近，杰里米的一个最亲密的朋友请他在一个婚礼上祝词。