clean的解释
a. 干净的
ad. 完全地
n. 清洁
v. 打扫
vi. 打扫,清扫
vt. 把...弄干净
clean的例句
The bullet went clean through his arm.
子弹穿过他的手臂。

Please clean the window as I can hardly see out.
请把窗子弄干净，我几乎看不到外面。