Polyenanthoamide
聚庚酰胺
🗣️ 情景例句
He made up his mind to give up smoking.
他下决心戒烟。
I'm too busy.
我太忙。
No, thanks. It's big, but it isn't heavy. It's light.
不用了，谢谢，是大盒子，但不重。很轻。