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》

They divide snow into four main categories, such as snow lying on the ground, snow floating in the sky, snow piling up, and snow piles.

他们把雪分为四大类，如地上的雪、飘在空中的雪、积雪和雪堆。

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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