污泥饼的英文：
sludge cake

The dewatered sludge is used as manure and fuel.
被脱水的烂泥使用作为肥料和燃料。

And this increases the chances for water sludge to form.
而这增加了水沉淀物的形成机会。

Theoretically sludge yield is nil for the extended aeration process.
对延时曝气法而言，理论上污泥生成量应为零。

In practice this is not the case since part of the sludge is not biodegradable.
实际上不是这样，因为有一部分污泥不能为生物所降鲜。

Better methods of dewatering and disposing of these sludges are needed.
需要研究更好的污泥脱水和处置方法。

A piece of cake
小事一桩

For dessert, we have fruit cake, cream cake and chestnut cake.
至于甜食，我们有水果蛋糕、奶油蛋糕和栗子蛋糕。

The knife easily cut into the cake.
刀一下子就切进了蛋糕。

The cakes were displayed in the window.
糕点陈列在橱窗中。

Dust sugar on to a cake.
将糖撒在糕点上。