Russia fixes launch pad damaged by Thanksgiving astronaut launch to the International Space Station
俄罗斯已在拜科努尔航天发射场修复了 31 号站点,这是支持国家载人航天任务的唯一发射场。自 11 月下旬以来,它一直处于停用状态。
Thousands of dams in the US are old, damaged and unable to cope with extreme weather. How bad is it?
美国的水坝已显示出损坏的迹象,而且随着年龄的增长和气候变化,损坏情况正在恶化。在预算和检查限制的情况下,卫星能否帮助确定维修的优先顺序?