产品经过检查并根据质量进行分级。

The products are inspected and then graded according to their quality.

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The products are inspected and then graded according to their quality.

grade 是名词,意思是"等级、级别",这里用作动词,表示"分级、评定等级"。 grade 作为动词时,指按照一定的标准对事物进行分类或评定等级。

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