Hexanedinitrile
[建] 己二
🗣️ 情景例句
Hi, Mr. Baker. We met before.
嗨， Baker先生， 我们以前见过面。
Don't forget bring it to him.
不要忘记带给他。
The tour should last about an hour and a half.
这次参观大概需要一个半小时。