| 单词 | cardboard | 
| 释义 | Word Frequency cardboard(ˈkɑːdˌbɔːd) noun 1.  a.  a thin stiff board made from paper pulp and used esp for making cartons  b.  (as modifier)  cardboard boxes adjective 2. (prenominal) without substance  a cardboard smile  a cardboard general | 
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