Polytetramethylene sebacamide
[化] 聚亚丁基癸二酰胺; 聚癸二酰丁二胺
🗣️ 情景例句
Which band of College English Test have you passed?
大学英语考试过了几级？
I got your back.
放心！
Sometimes we aren't able to get into every building because there are too many steps.
有时我们并不能进每栋楼房，是因为楼梯太多了。