classification of freight rate

例句：

1. 1. The scientists classified the samples according to their chemical properties.
   科学家们根据化学属性将样本进行了分类。
2. 2. This classification system is designed to categorize products based on their features.
   这个分类系统旨在根据产品特点进行分类。
3. 3. The new classification law will change the way we classify and use copyrighted works.
   新的分类法将改变我们分类和使用版权作品的方式。