根深蒂固

面对复杂多变的外部环境，我们做事必须做到根深蒂固。

miàn duì fù zá duō biàn de wài bù huán jìng, wǒ men zuò shì bì xū zuò dào gēn shēn dì gù.

Faced with a complex and changing external environment, our work must be deeply rooted.

某些陈规陋习在当地人们的观念中根深蒂固，需要花大力气加以改变。

mǒu xiē chén guī lòu xí zài dāng dì rén men de guān niàn zhōng gēn shēn dì gù, xū yào huā dà lì qì jiā yǐ gǎi biàn.

Certain stereotypes are deeply ingrained in local people's minds and require significant efforts to change them.