But publishers across ages have recognized that the Bible can be a profit center.

但一代又一代的出版商早就发现圣经也是一棵摇钱树.

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Controllable income is the excess of contribution margin over fixed costs controlled by the profit center.

边际贡献是指利润中心的销售收入减去售出产品的全部变动成本后的余额.

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