clean 
英 [kliːn]  美 [klin] 
n. 打扫，清洁

adv. 完全

v. （使）清洁

adj. 干净的；新的；正派的；无害的；清白的；公平的；整齐的；干脆的；清新的

例句：
The metro is efficient and spotlessly clean. 

地铁非常快捷，而且一尘不染。

She got up early and cleaned the flat. 

她早早起了床，将公寓打扫干净。

Her father cleaned his glasses with a paper napkin. 

她父亲用餐巾纸擦干净眼镜。

He cleaned the flakes away with his coat sleeve. 

他用衣袖将玉米片拂去。