比较级为：cleaner
n. 清洁工清洁剂，洗洁器干洗店，干洗商
adj. 清洁的，干净的（clean的比较级）
Cats are very clean animals.
猫是颇爱干净的动物。
The plane made a clean take-off.
飞机起飞得干净利落。
Scrub the vegetables clean.
把蔬菜刷洗干净。
Her clothes were clean but dowdy.
她的衣服干净却落后于时尚了。
She licked the spoon clean.
她把调羹舔得干干净净。
