It's just one of the filthiest cesspools you can imagine.

它就是一个你能想象得出的最污秽的化粪池。

It never dawned on these folks that the yellow fever was carried by mosquitoes living in cesspools of undrained swamps made ever worse by poor sanitation.

这些人从不晓得黄热病是由滋生在没有排水系统的化粪池内的蚊子所传播的，并且糟糕的公共卫生使情况更加恶化。