BEIJING, July 6 (Xinhua) -- Residents in Jinfeng Town of southwest China's Chongqing Municipality are banking on ongoing urban renewal projects to further improve their living standards, part of a bro ...

▲摘要：激光测距在弱场区域提供了一些最精确的引力检验，能够以地球为实验室，对爱因斯坦广义相对论进行实验探索。广义相对论的一项核心试验是参考系拖曳的幅度，即旋转质量对时空的拖曳效应。 研究组表明，由于优化的轨道、极低的面质比和高度均匀的后向反射器分布，近期发射的激光相对论卫星2号（LARES-2）结合了其前身LAGEOS卫星及GRACE卫星，能够以千分之一水平的相对不确定度测量地球参考系拖曳，比此前 ...

In a production hall in Huizhou, Guangdong Province, rows of television sets move along an automated assembly line. At one ...