想根治河流污染,必须同时治理上游工厂和沿岸生活污水。Xiǎng gēnzhì héliú wūrǎn, bìxū tóngshí zhìlǐ shàngyóu gōngchǎng hé yán'àn shēnghuó wūshuǐ.To eradicate river pollution, upstream factories and domestic wastewater along the banks must be treated at the same time.
这种病很难根治,需要长期调养。Zhè zhǒng bìng hěn nán gēnzhì, xūyào chángqī tiáoyǎng.This illness is hard to cure completely and needs long-term care.
他下决心根治自己拖延的老毛病。Tā xià juéxīn gēnzhì zìjǐ tuōyán de lǎo máobìng.He resolved to cure himself of his old habit of procrastinating once and for all.