qǐng / xiān / pàn / duàn / zhè / ge / cí / de / cí / xìng / zài / jué / dìng / tā / zài / jù / zi / zhōng / de / yòng / fǎ

请先判断这个词的词性，再决定它在句子中的用法。

First identify the part of speech of this word, then decide how it is used in the sentence.