城市更新不能只追求外观整齐,更要让河道恢复洁净的生态功能。Chéngshì gēngxīn bù néng zhǐ zhuīqiú wàiguān zhěngqí, gèng yào ràng hédào huīfù jiéjìng de shēngtài gōngnéng.Urban renewal must not only pursue tidy appearances; it should also restore the river's clean ecological function.
山里的泉水洁净甘甜。Shān lǐ de quánshuǐ jiéjìng gāntián.The spring water in the mountains is clean and sweet.
医院的病房必须保持洁净。Yīyuàn de bìngfáng bìxū bǎochí jiéjìng.Hospital wards must be kept spotlessly clean.