lunar space

例句：

1. 1.The astronauts spent a weekexploring the lunar surface.
   宇航员花了一周时间探索月球表面。
2. 2. The moon'sgravity is much weaker than Earth's, allowing for easier exploration of lunar space.
   月球的重力远低于地球，这使得更容易探索月球空间。
3. 3. Lunarspace has been explored by many countries,including China and Russia.
   许多国家，包括中国和俄罗斯，都曾探索过月球空间。