These instructions, defense artificially added chemicals in food, some harmful substance is but with the naked eye or simple method of inspection.
这些说明，防御食品中人为的添加化学物质、有害物质有些是可是用肉眼或简单的方法检验出来的。
That which can be done with the naked eye is called visual inspection; that which is done by gauges is called dimensional inspection.
肉眼检查的叫目测，使用检具来检查的工具检测。
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