Polypentamethylene azelamide
[化] 聚亚戊基壬二酰胺; 聚壬二酰戊二胺
🗣️ 情景例句
There are several tours of the Grand Canyon.
到大峡谷有好几个旅游团。
She looks blue.
她满面忧伤。
What nationality are you?
你是哪国人？