PVA

例句：

1. 1. This product is made from PVA and has excellent water resistance.
   这种产品由聚乙烯醇制成，具有极好的防水性能。
2. 2. The adhesive used in this tape is made from PVA.
   这种胶带使用的粘合剂是由聚乙烯醇制成的。
3. 3. The PVA solution can be used as a waterproofing agent for concrete.
   聚乙烯醇溶液可以用作混凝土的防水剂。