Pva
abbr. 聚醋酸乙烯酯（Polyvinyl Acetate）；聚乙烯醇（Polyvinyl Alcohol）；垂直取向构型（Patterned Vertical Alignment）
🗣️ 情景例句
She took a medical course.
她选读医学课程。
I would like you to call me.
我要你打电话给我。
What makes you say so?
你怎么这么说？