医院必须保持环境清洁,防止细菌传播。Yīyuàn bìxū bǎochí huánjìng qīngjié, fángzhǐ xìjūn chuánbō.Hospitals must keep the environment clean to prevent bacteria from spreading.
她把房间收拾得很清洁。Tā bǎ fángjiān shōushi de hěn qīngjié.She has tidied the room until it is very clean.
饭前洗手是保持清洁的好习惯。Fàn qián xǐ shǒu shì bǎochí qīngjié de hǎo xíguàn.Washing your hands before meals is a good habit for staying clean.