三句话不离本行

sān jù huà bù lí běn háng

to talk shop all the time (idiom)

三

sān

three

句

jù

sentence

话

huà

old variant of 話|话[hua4]

不

bù

no; not so

离

lí

to leave

本

běn

(bound form) root; stem

行

háng

(bound form) row; line