求翻译：其一我有销售工作经历，在之前的公司负责医学科研服务的销售和推广，有负责广东部分区域、海南及河北两省的产品销售。虽然我从事销售的工作时间还不长，但我喜欢从事销售这样挑战性的工作，能够让自己在挑战和压力中更快的成长；是什么意思？

First I have sales experience, sales and marketing before the company responsible for the medical research services, some areas in Guangdong, Hainan and Hebei Provinces product sales. While engaged in the sale of working hours is not long, but I like to engage in the sale of such challenging work, a

One of them I have sales experience, in the previous company is responsible for medical research service of the sales and marketing, and are responsible for the portion of the area, and Hainan and Hebei Provinces of product sales. Although I am engaged in the sale of the work time is not long, but I

Its I have the sale employment history, is responsible for the medicine scientific research service in before company the sale and the promotion, has is responsible for the Guangdong partial regions, Hainan and the Hebei two province product sales.Although I am engaged in sales the operating time no

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