Piperazinium
[化] 哌嗪┹
🗣️ 情景例句
I'm glad to help.
我很乐意帮忙。
How many dozen are you going to take?
你要拿几打？
Many of the tourists on board had begun bargaining with the tradesmen, but I decide not to buy anything until I had disembarked.
船上许多游客开始同商贩讨价还价起来，但我打定主意上岸之前什么也不买。