1、They want to be clean, but it is hard to identify that the dirtiness was not theirs.
他們倒想洗清罪名，但又很難確定那些勾當非他們所為。

2、Inside the flesh and blood is the dirtiness more than that inside the hell's sewage.
血肉包裹的軀體里有比地獄的污水更骯臟的東西。

3、There are obstacles too, mainly because of the sheer dirtiness of the business.
但油砂的開采也有障礙，主要是因為這個行業(yè)過于骯臟。

dirtiness翻譯