求翻译：Information technology is also critical for information sharing to facilitate logistics and supply chain planning and operations. Historically, coordination of logistics has been difficult since logistics activities are often performed at locations distant from information technology hardware. As a result, information was not available at the location of essential work in terms of both time and content. The past decade has witnessed remarkable advances in logistical communication systems capability. EDI, the Internet, Extensible Markup Language (XML), and satellite technology exist to facilitate communication between firms and facilities. Radio frequency allows short-range communication within facilities such as warehouses. Image, bar coding, and scanner technologies allow communication between supply chain information systems and their physical environment.是什么意思？

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