名词
中文翻译：插槽
同义词：
['bar code', 'slot code']
例句：
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1. The barcode on the package is scanned by the scanner.
包装上的条形码被扫描器扫描。
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2. The barcode is a unique identifier for each product.
条形码是每种产品的唯一标识符。
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3. The barcode helps to track the movement of goods.
条形码有助于追踪货物的移动。