Polydienes
(polydiene 的复数) 聚二烯
🗣️ 情景例句
Make sure everybody is at that meeting.
要确定每一位都出席这次会议。
You are saying you turn on the computer and see nothing?
你的意思是你把计算机打开后什么也看不见？
But you still haven't explained what you're doing here.
啊，你还没有说你是来干什么的。