BEIJING, April 24 (Xinhua) -- At Hunan Provincial Library in central China, 41-year-old Yan Sheng meticulously repaired fragile pages of ancient books under a microscope, surrounded by stacks of ...

关于《环球科学》和“科研圈”《环球科学》是世界领先科技媒体《科学美国人》独家授权中文版，服务于中国公众与科技群体，提供前沿科技报道与领先的科技资讯。《科学美国人》（Scientific American）创刊于1845年，是全球连续出版历史最长的科技期刊，为全球超过 500 万读者提供有关科技的前瞻报道和深度解读，在 14 ...

China Pet Foods’ Testing Center, with a total investment exceeding 15 million yuan, stands as the highest-standard testing facility in China’s pet industry. It is equipped with three main areas: the P ...