Polybutyrolactam
[化] 聚丁内酰胺; 尼龙-4
🗣️ 情景例句
I'm unemployed at the moment.
现在我失业了。
Personally,I prefer winter weather.
个人而言,我比较喜欢冬季天气。
You must have been driving at seventy miles an hour.
你刚才一定是以每小时70英里的速度开车。