yì / tiáo / qīng / xī / de / zhǔ / xiàn / guàn / chuàn / quán / piān / shǐ / wén / zhāng / dú / qǐ / lái / hěn / liú / chàng

一条清晰的主线贯串全篇，使文章读起来很流畅。

A clear central thread runs through the entire article, making it easy to read.