classification of income by function

例句：

1. 1.The scientists classified the samples according to their chemical properties.
   科学家们根据它们的化学属性将样本进行了分类。
2. 2. The company's new product line classification is designed to meet the needs of different customers.
   该公司的新产品线分类旨在满足不同客户的需求。
3. 3. The classifier was used to separate the grains into different categories.
   分类器被用于将谷物分成不同的类别。