其它无人驾驶的星际探险，主要有水手号太空船三次经过最靠近太阳的行星水星，揭示出水星与月球，地球的相同点。

In other interplanetary explorations without astronauts, Mariner 10 spacecraft three times passed by Mercury, the planet closest to the sun, revealing its similarity to both the earth and the moon.

youdao

其它无人驾驶的星际探险，主要有水手号太空船三次经过最靠近太阳的行星水星，揭示出水星与月球，地球的相同点。

In other interplanetary explorations without astronauts, Mariner 10 spacecraft three times passed by Mercury, the planet closest to the sun, revealing its similarity to both the earth and the moon.

youdao