Phosphonoacetone
二氧磷基丙酮
🗣️ 情景例句
The production department's waiting in the conference room.
生产部门的人正在会议室等你 。
Now, seeing them all here together for the first time.
现在他们都到了这里。
He came out of the library, a large book under his arm.
他夹着本厚书，走出了图书馆。