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    Development 订购在 天津
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    Development 订购在 天津
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    介绍
    The phrase research and development (also known as R and D or R&D), according to the Organization for Economic Co-operation and Development, refers to "creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of man, culture and society, and the use of this stock of knowledge to devise new applications".
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