molecular sieve sweetening

例句：

1. 1.The molecular sieve is used to separate different types of molecules.
   分子筛用于分离不同类型的分子。
2. 2.The molecular sieve was developed to improve the efficiency of separation processes.
   分子筛的开发是为了提高分离过程的效率。
3. 3. The molecular sieve filters out impurities from the liquid, making it cleaner.
   分子筛从液体中过滤掉杂质，使液体更干净。