Poly(vinyl acetal)
[化] 聚乙烯醇缩乙醛; 聚乙烯醇缩醛
🗣️ 情景例句
Oh, it's so good to see you!
噢 看到你真是太好了。
This is Mary Speaking.
我是玛丽。
However, this does not always happen.
然而，情况并不都是这样，