selective polymer

例句：

1. 1. The company is known for its selective hiring practices.
   该公司以其选择性招聘而闻名。
2. 2. He has a selective taste in music, preferring classical to pop.
   他对音乐有选择性的品味，更喜欢古典音乐而不是流行音乐。
3. 3. The research was selective and focused on a specific area of expertise.
   这项研究是选择性的，专注于一个特定领域的专业知识。