Hexinic acid
[化] 己炔酸
🧩 词语组成解析
🗣️ 情景例句
Please drive carefully.
请小心开车。
It is our permanent principle that contracts are honored and commercial integrity is maintained.
重合同、守信用是我们的一贯原则。
He was never seen again.
后来再也见不到这个人了。