clean

/kliːn/

adj.光明正大的



It's a good clean contest.

这是一场光明正大的竞赛。

adj.平整的



I tried to make a clean cut, but the knife wasn't sharp enough.

我想切整齐点儿，可是刀子不够锋利。

adv.完全地



The bullet went clean through his shoulder.

子弹穿透了他的肩膀。

最后给大家补充一个俚语

as clean as a pin

干干净净

pin /pɪn/大头针



The fresh snow on the ground is as clean as a pin.

白茫茫的大地真干净。