clean/cleanly
这两个词都是形容词clean的副词，但两者含义不同。Clean用以指（行动）“彻底地；完全地”，相当于completely。如：
The thief got clean away.小偷已逃之夭夭。
I clean forgot about calling him.我把给他打电话的事忘得一干二净。
It’s time the government came clean about their plans for education.现在是政府彻底说明教育计划的时候了。
Cleanly表示“干净地”的实义和喻义。如：
The new car uses fuel that burns cleanly.这款新车使用环保型燃料。
The boat moved cleanly through the water.小船在水面上轻快地行走。