Fluorocarbon
[建] 碳氟化合物
🗣️ 情景例句
Don't talk with your mouth full.
嘴里满是东西时别说话。
He who would search for pearls must dive below(or deep).
欲寻珍珠，须潜水下。
We are really glad to see you so constructive in helping settle the problems as regards the signing of the contract.
我们很高兴您在解决有关合同的问题上如此具有建设性。