go off on a tangent (go off on a tangent)

Idiom Communication

含义

to suddenly start talking about something unrelated

突然开始谈论无关的话题 (tūrán kāishǐ tánlùn wúguān de huàtí)

例句

"He tends to go off on a tangent when discussing politics."

"他谈论政治时常常偏离话题。" (Tā tánlùn zhèngzhì shí chángcháng piānlí huàtí.)