地球这颗蓝色星球,依靠大量珍贵的液态水,孕育出蓬勃生命。但与地球相隔仅38万公里的月球,却一片荒芜,寸草不生。月球究竟有没有水?科学家从未停下探索的脚步。此前科学家推测,月球背面常年阴暗的陨石坑里可能藏有冰。如今,两项最新研究证实,月球光照面也可能存在水。
We have grown stronger in basic research and original innovation, made breakthroughs in some core technologies in key fields, and boosted emerging strategic industries. We have witnessed major successes on multiple fronts, including manned spaceflight, lunar and Martian exploration, deep sea and deep earth probes, supercomputers, satellite navigation, quantum information, nuclear power technology, new energy technology, airliner manufacturing, and biomedicine. China has joined the ranks of the world's innovators.
比如大多数液体会随着温度的降低密度变得更大,而水则不是这样——它的最大密度大约出现在略高于冰点的4摄氏度,这也就是为什么在寒冷的冬天,湖泊、河流、海洋中的水从表面开始向下结冰,让在水中生活的生物在寒冷的冬天也能生存。