Number + 行 + Noun
行 (háng) is a measure word used to count rows or lines, such as 一行古文 (a line of ancient text). When pronounced xíng, it functions as an adjective meaning "okay" or "competent." Context determines which reading and meaning apply.
墙上写着一行古文,没人能看懂。
Qiáng shàng xiězhe yī háng gǔwén, méi rén néng kàn dǒng.
A line of ancient text is written on the wall, and no one can understand it.
她一行一行地读着那封信。
Tā yī háng yī háng de dúzhe nà fēng xìn.
She read the letter line by line.
诗的最后一行特别感人。
Shī de zuìhòu yī háng tèbié gǎnrén.
The last line of the poem is particularly moving.