To one degree or another, all successful viral marketing strategies use most of the six principles outlined above.

或多或少，所有的病毒式营销策略大体上都使用了以上列举的六条原则。

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At the beginning of 21st century, a lot of marketing strategies and tools are based on Internet, and viral network marketing is an important one among them.

21世纪初，许多营销策略和工具都是基于以互联网为基础，病毒性网络营销是其中重要的一种。

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At the beginning of 21st century, a lot of marketing strategies and tools are based on Internet, and viral network marketing is an important one among them.

21世纪初，许多营销策略和工具都是基于以互联网为基础，病毒性网络营销是其中重要的一种。

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