They agreed to repair the damage free of cost.
他们同意免费把损坏处修好.
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There are also a few sites that offer games online absolutely free of cost.
也有一些网站提供在线游戏完全免费的.
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He is teaching children free of cost and that is a very good thing.
他不收费教孩子们练水中瑜伽,这真是一件好事.
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