1·Outflow channels are probably relics of catastrophic flooding on Mars long ago.
流出通道可能是很久以前火星上发过洪水的遗迹。
2·Lower mountains tend to be older, and are often the eroded relics of much higher mountain chains.
海拔较低的山脉往往更古老，且通常是比它高得多的山脉的侵蚀遗迹。
3·It is a charming land that boasts abundant historical relics and enjoys superb natural environment.
这是一个迷人的地方，历史遗迹丰富，自然环境优美。
4·It seems that the last is a later development while the first six groups show the relics of an older system.
似乎最后一个是后来建造的，而前六组是更古老时代的遗迹。
5·Establishments projects of tourism: iron chain bridge above the canyon, whirlybird tour project, water amusement, and geographic museum of glacier relics.
旅游建设项目：大峡谷铁链桥、直升飞机旅游项目、水上游乐项目和冰川遗迹地质博物馆。