In a very distant place, there is a very ancient river.
在很遥远的地方,有一条非常古老的河。
Ancient river channels and craters suggest that Mars once supported oceans of water.
远古的河道和环形山暗示了火星上曾有过水源。
The ancient river channel can be divided into 5 parts vertically, in fining upwards tendency.
在垂向上,古河道自下而上分为5段,其粒径呈愈向上愈细的趋势。
应用推荐