classification of costs by nature

例句：

1. 1. The scientists classified the new species into different groups.
   科学家将新物种分为不同的组。
2. 2.The researchers are classifying the data according to their relevance.
   研究人员正在根据相关性对数据进行分类。
3. 3. The classifier is designed to categorize objects based on shape and size.
   分类器旨在基于形状和大小对对象进行分类。