debris [ˈdebri:]

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n.瓦砾堆，废墟，碎片

broken or torn pieces of something larger

After the bombing there was a lot of debris everywhere. 轰炸之后到处瓦砾成堆。
Bacteria sticks to food debris in the teeth, causing decay. 细菌附着在牙缝中的食物残渣上，导致蛀牙。