类项

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品进行了分类。
2. 2. The book is a great resource for classifying different types of plants.
   这本书是分类不同种类植物的宝贵资源。
3. 3.Teachers are often asked to categorize students based on their academic performance.
   教师经常被要求根据学生的学业表现进行分类。