classify
v. 把……分类，把……分级；把（信息）归入保密级别
第三人称单数 classifies
现在分词 classifying
过去式 classified
过去分词 classified
例句
Classify them by branch, region, and year.
将它们按部门、地区和年份分类。
Thing is that it's very difficult to classify.
问题是很难进行分类。
This is true regardless of how we classify the service.
无论我们如何对服务进行分类，这都是真的。
