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。

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.

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这些问题一般属于两种类别。

The problems generally fall into two categories.

《柯林斯英汉双解大词典》

垃圾分类包括四种类别：可回收物、有害垃圾、干垃圾和湿垃圾。

Garbage sorting includes four categories—recyclable, harmful, dry and wet waste.

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Genre" Is simply a fancy word for "Type" Or "Kind" so what genre of piece is this by Beethoven?

风格,只是某种比种类或类别,更花哨的说法,那这首贝多芬作品属于什么风格呢

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