hé / huǒwèiyī / xiāngbǐ / huǒwèièr / tǐjī / gèng / xiǎo / yùnxíng / guǐdào / yě / gèng / yuǎn

和火卫一相比，火卫二体积更小，运行轨道也更远。

Compared with Phobos, Deimos is smaller and also travels in a more distant orbit.