Polybutyrolactam
[化] 聚丁内酰胺; 尼龙-4
🗣️ 情景例句
Come in, come in. Please, come in.
请进， 请进。请进来。
What shall I send hin for his anniversary?
我要送他什么东西作为周年纪念礼物？
Finally, and above all, enjoy your reading!
最后而又最重要的是，你得喜欢阅读！