Polypentamethylene azelamide
[化] 聚亚戊基壬二酰胺; 聚壬二酰戊二胺
🗣️ 情景例句
I'm sorry you have to leave so soon.
很遗憾你不能多呆会儿。
What day is tomorrow?
明天是星期几？
'Oh, that,' said the Ambassador.
“那个嘛，”大使说，