水银是一种液态金属，而水星这颗行星，是肉眼能看到的运动最快的天体。火星，为什么火星是红色的？
Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, why is Mars red?
水银是液态金属，行星水星是肉眼能看到的运动最快的天体。
Mercury is a liquid metal, and Mercury, the planet, is the fastest moving heavenly body that naked eyes can see.
水星是最靠近太阳的行星。它也是最小的和最快的行星。
Mercury is the closest planet to the sun. It is also the smallest and fastest planet.
水星是最靠近太阳的行星。它也是最小的和最快的行星。
Mercury is the closest planet to the sun. It is also the smallest and fastest planet.
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