Hf akylation
[建] 氢氟酸催化基化
🧩 词语组成解析
[医] 铃(72号元素)
🗣️ 情景例句
Hi, John, how's it going?
嗨，约翰，你好吗？
You won't believe it,but it was really cheap.
你不会相信的，但这条裤子确实很便宜。
Which language is spoken by the largest number of people in the world?
世界上哪种语言说的人最多？