Hexamethylenediamine
[建] 己二氨-[1,6]
🗣️ 情景例句
I hope I can repay you for it.
我希望能报答你。
As the touchstone tries gold,so gold tries man.
试金之石可试金，正如黄金能试人。
No, it isn't.It's a ruler.
不，不是，这是一把尺子。