A tax on upstream carbon sources is one easy way to put a price on carbon emissions, although some countries may wish to use other methods, such as emissions trading schemes.

对上游碳资源征税是为碳排放定价的一种简单方法，尽管一些国家可能希望使用其他方法，例如碳排放交易计划。

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For example, you may wish to use transcoding.

例如，可能需要使用编码转换。

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You may wish to use it as a template for your own complaint.

你也许希望用作自己的模板。

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On a day when thousands of people around the world are preparing to explain how a web cam works to elderly relatives in a vain attempt to wish them a merry Christmas, some may just go straight to the old-fashioned use of a telephone.

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