duff
复数形式
duffs
1
硬布丁, 蒸布丁
a stiff flour pudding steamed or boiled usually and containing e.g. currants and raisins and citron
同义词：
2
落叶层, 腐殖质层
the layer of decomposing organic matter, such as leaves, twigs, and other plant material, that accumulates on the soil surface