Piperazinium
[化] 哌嗪┹
??? 情景例句
The evening newspaper is cheaper than the morning paper.
晚報比早報要便宜。
The tour will take about an hour and a half. We ought to be back here by 3:00.
參觀大概要一個半小時，3點鐘以前回到這里。
Did you note the damage on the bill of lading?
你把損壞情形注明在提貨憑單上了沒？