自学了《采购成本控制与供应商管理.的翻译：Self-study of the purchasing cost control and supplier management. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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Self-study of the purchasing cost control and supplier management.

Has studied independently "the purchase cost control and the supplier manages.

Self-study with the procurement cost control and management of suppliers.

Self-study of the purchasing cost control and supplier management.