Fluorocarbon
[建] 碳氟化合物
🗣️ 情景例句
Why will the voters vote for you against Boswell,Mrs. Stewart?
为什么选民会投票支持你和Boswell对抗呢，Stewart太太？
He who cannot hold his peace will never live at ease.
嘴巴不紧，生活不宁。
Where can I go for help?
我该怎么办呢？