Polycarbonates
(polycarbonate 的复数) [化] 聚碳酸酯
🗣️ 情景例句
This community has always been very generous.
这个社区一向是非常慷慨的。
Knowledge is long, life is short.
吾生有涯，而知无涯。
What is it?
什么问题。