Polynonanoylamide
[化] 聚壬酰胺; 尼龙-9
🗣️ 情景例句
I can't sing, dance or act, so how can I possibly get into the performing arts?
我不会唱歌、跳舞，不会演戏，怎么能进入娱乐界呢？
It's been a long time.
好久不见了。
Last summer, I went to Italy.
去年夏天，我去了意大利。