I tried to read her latest book but found it as dull as ditchwater .

我尝试去读她的近作，但是发现极其无味。

This novel is as dull as ditchwater , it doesn 't have any .

这部小说的情节真干巴,没什么故事性。

What 's it to be , ditchwater sal ? Heads or tails ?

你想怎么死？砍头还是尾巴？

The lecture was as dull as ditchwater .

那次讲座非常呆板乏味。