Use a notebook, ruler, and pen to check your food choices.

用笔记本、标尺和钢笔来检查你作出的食物选择。

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Check the voltage whether is normal or not: use the ammeter or testing pen.

电源电压是否正常：用仪表或探笔测试。

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Check the voltage whether is normal or not: use the ammeter or testing pen.

电源电压是否正常：用仪表或探笔测试。

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