Don't throw that cardboard box away it may come in handy. 把那纸盒丢掉--著.
The photograph was backed with cardboard. 照片背衬层纸板.
cardboard [ noun ]
a stiff moderately thick paper
<noun.substance> [ adj ]
without substance
<adj.all> cardboard caricatures of historical figures
Cardboard \Card"board`\ (k[aum]rd"b[=o]rd`), n. A stiff compact pasteboard of various qualities, for making cards, etc., often having a polished surface.