Polyset
聚酯树脂
🗣️ 情景例句
You never know what you can do till you try.
除非尝试，否则你永远都不知道你有何价值。
It is harder to marry a daughter well than to bring her up well.
养女容易嫁女难。
Is this a pencil?
这是一支铅笔吗？