Mars actually has two moons — Phobos and Deimos.

火星其实有两个月球卫星——火卫一和火卫二。

Later flights will land on Deimos, one of Mars' two moons.

然后降落在火星的两颗卫星之一火卫二。

At 22 and 12 kilometers wide, however, its inner moon Phobos and outer moon Deimos are figurative small potatoes.

在22公里和12公里宽处，火星内部卫星火卫一和外部卫星火卫二像生动形象的两颗小土豆。

The moons of Mars, Phobos and Deimos, are so small that they play no stabilising role on the rotational axis.

火星、火卫一和火卫二的卫星都太小了，它们在转轴上起不到稳定作用。