Trifluoride
三氟化物
🗣️ 情景例句
Where are you working now?
你现在在哪里工作？
Excuse me,sir.Can you give me some information
对不起,先生.你能给我一些信息吗？
Hello, Jim! Did you have a good time at the cinema?
你好，吉姆！你在电影院过得很开心吧？