Your wedding ring can be engraved with a personal inscription at no extra cost.

你的结婚戒指可以刻上个人题字不另收费。

《柯林斯英汉双解大词典》

If you use standard Internet protocols to link your nodes, you can ride a huge raft of existing technology with no extra engineering cost.

如果使用标准因特网协议链接您的节点，那么可以使用大量的现有技术，而不需额外的开发成本。

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An order from one of WidgetCo's customers is implemented as a list of Widget objects, with one extra method to compute the order's total cost.

来自Widget Co客户之一的订单会作为一个Widget对象列表来实现，并使用一个额外的方法来计算订单的总成本，即。

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And finally, a lawyer who surprises you with extra cost.

FORBES: What Start-ups Should Know About Hiring a Lawyer

Because of this reform, insurance companies have to cover basic preventative things like contraception, cancer screenings, prenatal care, with no extra cost.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event

Against this formidable competitor, uranium will struggle for many years to come especially with the extra cost and political handicap that Fukushima is bound to add.

WSJ: After Japan's Earthquake and Fukushima Disaster, Matt Ridley on Gas-Fired Generation and Thorium | Mind & Matter