In fact, over fifty per cent of genuine British surnames derive from place names of different kinds, and so they belong to the last of our four main categories.

事实上，超过50%的真正的英国姓氏来源于不同种类的地名，所以地名是姓氏来源四个主要类别中的最后一类。

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The results can be divided into three main categories.

结果可分为三大类。

《牛津词典》

Shop-lifters can be divided into three main categories: the professionals, the deliberate amateurs, and the people who just can't help themselves.

商店扒手可分为三大类：专业人士、有意为之的外行和无法控制自己的人。

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First, there are two main categories of advisers: those registered with a broker-dealer (brokers) and Registered Investment Advisers (investment advisers).

FORBES: Magazine Article

In addition, to the five main categories there are other types of drugs that are subject to restrictions on their use.

BBC: Doping: Banned substances

Alaska was the only state that did not finish in the top 20 in at least one of our six main categories.

FORBES: The Worst States For Business