polyamic acid solution

• 聚酰胺酸溶液

polyamic acid solution的用法和样例：

例句

1. An acid solution is concentrated when it has very much acid in it.
   当酸溶液里含有很多酸时，它就被浓缩了。
2. Gastric juice contains hydrochloric acid to provide an acidic solution for pepsin.
   胃液内含有盐酸给胃蛋白酶提供酸溶液。