The prime driving force adopting lead-free technology is the legislation and marketing advantage of green products.
环境法规及市场对绿色产品的需求，是采用无铅生产技术的主要动力。
Virtual reference service is involved in marketing its reference to the source of information, technology, and the staff decided advantage.
虚拟参考咨询服务是信息商品价值的营造者。
Virtual reference service is involved in marketing its reference to the source of information, technology, and the staff decided advantage.
虚拟参考咨询服务是信息商品价值的营造者。
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