the practice of marking pauses and stops in a sentence as used in classical Chinese texts before modern punctuation marks were introduced

研读古籍时，准确划分句逗是理解文意的第一步。

the specific punctuation marks known as the period (full stop) and the comma

他的作业中句逗使用不规范，经常一逗到底。

the rhythmic or structural units of a text, comprising both full sentences and shorter phrases

这篇辞赋句逗整齐，读起来朗朗上口。