Polynonanoylamide
[化] 聚壬酰胺; 尼龙-9
🗣️ 情景例句
Keep smiling! things will calm down.
乐观一点，事情会平息下来的。
My brother came in,changed his clothes,and went out again.
我的兄弟进来了，换掉了他的衣服，并再去外面了。
As a matter of fact, it is the other way around.
事实上，情况正好相反。