clean up / clean out / clean off / clean away 有什么区别.能分别给出一个典型的实例吗谢谢.

1,clean up清理；大捞一笔
They don't clean up those bits of pizza and bits of chewed bread and cheese.
谁都不愿意清理吃剩的比萨,奶酪渣还有面包渣,
2,clean out 清除,打扫干净
I need people around here that I can trust.
Clean out your station.
在这里我需要的事值得我信任的人.
收拾下你的桌子走人.
3,clean off 扫除；擦去,消除
If that is not possible, then clean off the equipment and your shoes when leaving
4,clean away： 清除垃圾