It was a road of cultural and technological exchange among China, India, Persia and the Mediterranean for almost 3,000 years. It extended over 4,000 miles from ancient China westwards.
它还是一条中国和印度、波斯及地中海国家文化和技术交流的通道，这种交流延续3000多年、地域从古中国向西覆盖4000英里。
The focus of such exposition is products and technologies with high scientific content, holding technological exchange and lectures, and convening forum on applied technologies of surfactant.
此次展览会的重点是：展示当今相关科技含量高的产品、技术﹑举办技术交流讲座；召开表面活性剂应用技术方面的论坛。
The focus of such exposition is products and technologies with high scientific content, holding technological exchange and lectures, and convening forum on applied technologies of surfactant.
此次展览会的重点是：展示当今相关科技含量高的产品、技术﹑举办技术交流讲座；召开表面活性剂应用技术方面的论坛。
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