1. The astronauts are preparing to explore the terra of Mars.
宇航员们正在准备探索火星的土地。
2. The terra beneath our feet is incredibly diverse.
我们脚下的土地是非常多样化的。
3. He longs to travel and see different terras around the world.
他渴望旅行，看看世界各地不同的土地。