Polybutyrolactam
[化] 聚丁内酰胺; 尼龙-4
🗣️ 情景例句
Pete wrote us and told us.
Pete写信告诉我们的。
Though thy enemy seem a mouse,yet watch him like a lion.
敌人即使小如鼠，防他也要如防狮。
It was getting very windy in the hills.
山上还刮起了大风。