Polybutyrolactam
[化] 聚丁内酰胺; 尼龙-4
🗣️ 情景例句
These knives are guaranteed never to go blunt.
这些刀保证不会变钝。
I hope to conclude some business with you.
我希望能与贵公司建立贸易关系。
After jumping about on the carpet and twisting the human frame into uncomfortable positions,
我在地毯上跳来蹦过去，扭曲身子，摆出各种姿势，弄得浑身不舒服，