Mars is the fourth planet in order from the sun.
火星是太阳系的第四颗行星。
Saturn is the planet sixth in order from the sun.
土星是依次离太阳的第六颗行星。
The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
我们太阳系的行星有水星、金星、地球、火星、木星、土星、天王星、海王星。
