顽固的部门利益往往比技术难题更难破解。Wángù de bùmén lìyì wǎngwǎng bǐ jìshù nántí gèng nán pòjiě.Stubborn departmental interests are often harder to resolve than technical problems.
他太顽固了,谁也劝不动他,他不会改变想法。Tā tài wángù le, shéi yě quàn bu dòng tā, tā bú huì gǎibiàn xiǎngfǎ.He's too stubborn; no one can persuade him, he won't change his mind.
这种顽固的疾病困扰了他多年,至今仍未治好。Zhè zhǒng wángù de jíbìng kùnrǎo le tā duō nián, zhìjīn réng wèi zhìhǎo.This stubborn illness has troubled him for many years and still hasn't been cured.