Marginal revenue is the additional revenue earned from selling another unit.

边际收入是每增加一个单位的销售量赚取的额外收入。

If hiring that worker brings in more marginal revenue than marginal cost, then, congratulations!

如果雇佣工人带来的边际收益大于边际成本，那么恭喜！

So if a pizza company can sell every pizza for 10 dollars then their marginal revenue for each is 10 dollars.

所以如果一家披萨公司能以10美元的价格出售披萨，那么每个披萨的边际收入是10美元。