Piperazinium
[化] 哌嗪┹
🗣️ 情景例句
The evening newspaper is cheaper than the morning paper.
晚报比早报要便宜。
The tour will take about an hour and a half. We ought to be back here by 3:00.
参观大概要一个半小时，3点钟以前回到这里。
Did you note the damage on the bill of lading?
你把损坏情形注明在提货凭单上了没？