这种旧观念在老一辈人心里根深蒂固。Zhè zhǒng jiù guānniàn zài lǎo yí bèi rén xīnli gēnshēndìgù.This old way of thinking is deeply rooted in the minds of the older generation.
吃饭要先敬长辈,这个习惯已经根深蒂固了。Chī fàn yào xiān jìng zhǎngbèi, zhège xíguàn yǐjīng gēnshēndìgù le.At a meal you should honour the elders first, and this habit is already deeply ingrained.
他对这座城市的感情根深蒂固,怎么也离不开。Tā duì zhè zuò chéngshì de gǎnqíng gēnshēndìgù, zěnme yě lí bù kāi.His attachment to this city runs so deep that he can never leave it.