点击下方单词,选择对的这个单词
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及物动词
1. a sheet of material (metal, plastic, cardboard, waxed paper, silk, etc.) that has been perforated with a pattern (printing or a design)ink or paint can pass through the perforations to create the printed pattern on the surface below
多通过句子记忆单词，而不是单独死记硬背。
