Polyamide
[化] 聚酰胺
🗣️ 情景例句
Why does it have to be one or the other?
为什么非得有这个就没有那个？
What is the total circulation of this newspaper.
这家报纸总发行量多少？
After working with bees for many years, Professor Von Frisch was puzzled by something he had noticed again and again.
在和蜜蜂打了多年的交道后，冯·弗里施教授对他反复注意到的事感到迷惑。