pt100热电阻测温范围:请翻译以下段落

Since the 90's, as a result of the computer widespread application, the network popular and have been mature, the credit card popularization application as well as the electronic security transaction agreement formulation, the electronic commerce development entered the internet time. Uses simply, is quick, the low cost electronic communication way, business both sides does not seek a meeting carries on each kind of business trade activity. Under this kind of transaction form, more and more many commodities have been all moved to on the Internet net. One kind of brand-new transaction place, the electronic commerce website arises at the historic moment. This article elaborated a on-line bookstore system performance history. First has carried on the thorough careful system analysis to the entire bookstore system, has carried on the system function the analysis, and has divided the module, finally introduced the overall system flow trend. Then, from the database logical design and the realization, has carried on the summary to the overall system table of contents organization. Finally has carried on each module contact surface and the function the narration.