Sec.-butyl
[化] 仲丁基
🧩 词语组成解析
n. 丁基\\n[医] 丁基
🗣️ 情景例句
Then an adult must sign for you.
那就必须有一位成年人来替你签字。
The flight number is ak708 on september 5th.
班机号码是9月5日ak708
I used to travel by air a great deal when I was a boy.
我在幼年的时候，曾多次乘飞机旅行。