The packing design essence is the commercial design, is marketing method, is economic activities.
包装设计的实质就是商业设计、是营销手段、是经济行为。
There are two categories in details: direct marketing value method and substitutable marketing method.
具体说来有两大类：直接市场价值法和替代市场法。
There are two categories in details: direct marketing value method and substitutable marketing method.
具体说来有两大类：直接市场价值法和替代市场法。
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