`pron` 是代词（pronoun）的缩写，它是一种词性，用来代替名词或一句话。代词在句子中充当主语、宾语、表语等成分，并且具有名词和形容词的功能。
代词的种类包括：
人称代词：I, you, he, she, they, we
物主代词：my, his, your （your 的复数形式为你们的）
指示代词：this, that, these, those
反身代词：myself, yourself, himself, herself, itself, ourselves, yourselves, themselves
相互代词：each other, one another
疑问代词：who, what, which, whose
关系代词：who, which, that
不定代词：some, any, none, all, few, many, several, one
替代词：the, a, an
代词的使用可以避免句子中不必要的重复，并使得句子更加流畅