Cost is the source of value creation and the driving force of earning profit.
成本是价值创造的源泉，也是产生利润的驱动力。
Low cost is the main reason for the creation of online bookstore.
成本低廉更是开设网上书店的主要原因。
No cost of a website creation and support.
任何一个网站的建立和支持成本。
No cost of a website creation and support.
任何一个网站的建立和支持成本。
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