If your mobile phone is wrong, the store will repair it free or charge.

如果你的手机坏了，商店将免费维修。

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If the product is priced too low, or provided free of charge, the consumer may perceive it as being low in quality.

如果产品价格过低，或者免费提供，那么消费者也许会认为产品质量不好。

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Because it answers the eternal question that all iPhone developers have: should my app be free or should I charge for it?

它回答了所有iPhone软件开发者的永恒问题：我的应用程序到底该不该收费？

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We, in fact, borrow oxygen or steal oxygen from the air free of charge.

我们事实上免费从空气中,借或者偷氧气。

麻省理工公开课 - 固态化学导论课程节选

Ferries stop at the main islands and make request stops at smaller harbours, and are either free or charge cyclists just a few euros.

BBC: Island hopping in Finland

Ms. Harris says many college career centers offer services to alumni free of charge or for a small fee.

WSJ: Turning That Layoff Into Career Catalyst

It provides popular high performance games like Modern ComPat3 and Asphalt7 for a discount or free of charge for Vega R3 users.

ENGADGET: Pantech Vega R3 packs Snapdragon S4 Pro, 5.3-inch screen into one hand