Oh well, that's all as clear as mud, then.

哎呀，那么一来这真是成了一本糊涂账了。

Your explanation is as clear as mud.

你的解释一点都不清晰。

So, whether the blame lies with exhaust fumes or desert dust is as clear as mud.

所以，到底应该怪罪于汽车和工厂排出的废气，还是沙漠来的沙尘，答案再混浊不过了。

Some people think simply increasing the number of balls is the answer. Whether that will really help is as clear as mud.

有些人简单得认为只要增加水泥球的数量就能解决这个问题，但是否真的有用，没有谁能说得清。

He gave me directions how to get there. There were about as clear as mud though. I wish I'd asked him to draw a rough sketch-map.

他对我说了怎么去那里的路线，但是一点也不清楚。要是我请他画个大致的草图就好了。