求翻译：While EDI has made significant inroads into logistics communication, its penetration is beginning to plateau at about 50 percent of the transactions. Large manufacturers, distributors, and retailers have adopted EDI as a means to exchange information with major trading partners, but the substantial setup costs and expertise required have limited its application by medium and small firms. Annual surveys of logistics firms by The Ohio State University indicate the majority of EDI activity is with vendors and key account.是什么意思？

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