It was considered an ef5 tornado which is the highest possible categorization for a tornado.

它被认为是 EF5 级龙卷风，这是龙卷风的最高分类级别。

For the first time in this book, he teaches you a categorization of four tiers that is super helpful.

在书个超有用的四层分类。

Race was a large focus of both “scientific” and social categorization in the 19th century, determining everything from legal status to the assignment of assumed traits like intellectual capabilities or physical endurance.

在19世纪，“race”是“科学”和社会分类的大焦点，它决定了切，从法律地位到智力或身体耐力等假定特征的分配。