corrugated [ˈkɒrəgeɪtɪd]

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附加级

adj.波纹的；缩成皱纹的；波纹面的；波纹状的v.（使某物）起皱褶(corrugate的过去式和过去分词)

a corrugated iron roof 波纹铁屋顶
His brow corrugated with the effort of thinking. 他皱着眉头用心地思考。来自《简明英汉词典》