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- 把手洗乾净，别把写字的纸弄脏了。
Wash your hands or you'll make smudges on the writing paper.
- 果酱弄脏了她的手指。
She smear her finger with jam.
- 不洁的，脏的被污物覆盖或弄脏的；极其丑陋的
Covered or smeared with filth; disgustingly dirty.
- 别把镜头弄脏了，我刚刚擦过。
Don't smear the lens; I've just polished it.
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