Phobos and Deimos are my two moons.

火卫一和火卫二是我的两个卫星。

Phobos is the larger of the orbiting two.

火卫一是两个当中更大的那个。

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。

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。

Mars has two moons: small, potato-shaped rocks named Deimos and Phobos.

很小，土豆形状的岩石质火卫二和火卫一。

Both are tiny: Phobos is about 25 kilometers across, and Deimos just 15.

火卫一直径约25公里，火卫二直径仅15公里。

In 50,000,000 years Phobos, a moon of Mars, will collide with the planet causing massive destruction there.

在五千万年后，火星的卫星，火卫一将与火星相撞，造成巨大的破坏。

Tides from Mars are altering its orbit, slowly lowering Phobos closer and closer to the surface.

来自火星的引潮力改变了它的轨道，慢慢地将火卫一的轨道高度降低到离地表越来越近的地方。

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。

Phobos for instance orbits just 3,700 miles above the surface of Mars and whips around it three times every single day.

以火卫一为例，它的轨道距离火星表面只有 3700 英里，每天绕火星三圈。