当人们谈论账本底线的时候，他们的意思通常是净利润率——扣除所有费用、利息和税金之后公司所赚的钱。

When people talk about the bottom line, they generally mean net profit margin — the money the company earns after paying all its expenses, interest, and taxes.

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通常口墨盒的利润率比打印机本身的利润率高。

In general, the profit margin is higher on ink refills than on printers themselves.

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拿一个零售商的例子，尤其是低价的零售商来说，一个折扣零售商的利润率通常会低至25%。

And example would be a retailer, particularly a low price retailer. The gross margins of a discount retailer could be as low as 25%.

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