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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The code below illustrates the objects and methods necessary to get back a book's price.

如下的代码显示了获得图书价格所需的对象和方法。

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The higher labor costs for milling and weaving in Europe, where more traditional manufacturing methods are employed, account for the higher purchase price.

欧洲采用较传统的生产方式，加工与纺织的人工成本因而较昂贵，售价也较高。

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"The formula effect generally, and particularly in the case of clothing, is dependent not just on the choice of index but also on the characteristics of the price movements and levels being measured, sample design, choice of base period and price collection methods, " said its spokeswoman Jill Leyland.

BBC: Inflation: No change to RPI calculation

The included veggies, type of pasta, marketing language around prep methods, price point, etc are all up for discussion.

FORBES: Food Genius Helps Food Industry Understand Trends with Big Data Tools

Direct operator billing will also reflect the same price points as current payment methods, ensuring a consistent user experience.

ENGADGET: Skype strikes deal with Mach to expand direct carrier billing for credit purchases