灰市的香水和化妆品现在常以邮购方式售出。
Grey-market perfumes and toiletries are now commonly sold by mail.
因此，必须加强对灰市场理论的研究，以指导跨国经营企业抵御灰市场的侵扰。
Therefore, it is necessary to enhance a theoretical research on the gray market to guide transnational enterprises to protect against the attack of the gray market.
因此，必须加强对灰市场理论的研究，以指导跨国经营企业抵御灰市场的侵扰。
Therefore, it is necessary to enhance a theoretical research on the gray market to guide transnational enterprises to protect against the attack of the gray market.
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