最低等级的“青铜卖家”的销售额必须达到1.2万美元/年（销售额，非利润），或每年至少销售1200件商品。

To reach the lowest level, bronze sellers must rack up $12,000 in sales (sales, not profits), or move 1,200 items over the course of a year.

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结果表明：当归的商品规格等级高低与阿魏酸含量之间无明显相关性。

The results showed that no significant relativity between the commercial grades and the Ferulic acid.

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