Polyvinyl
a. 聚乙烯基的
🗣️ 情景例句
That's what I mean.
我就是指的这个。
Where do you go to school?
你在哪里上学？
Soon afterwards, the balloon began to descend and it landed near an airfield.
不久，气球开始降落，在一个停机坪附近着了陆。