提高产品的实用性，研发新产品的翻译：Improve the usability of products, research and development of new products 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

Improve product availability, development of new products

Improve the usability of products, research and development of new products

Enhances the product the usability, researches and develops the new product

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Improve the usability of products, research and development of new products