Polymine
聚乙烯亚胺; 聚乙烯亚胺
🗣️ 情景例句
I'm the vice-president of new toy development.
我是负责新玩具开发的副总裁。
No. It's only a little way.
不远，只有一小段路。
and they provided a striking demonstration of the potentialities hidden in instruments and apparatus.
并充分显示出了仪表和仪器的潜在力量。