在很长一段时间里，没人知道火星是什么时候被发现的，谁发现的，也不知道有一种行星可以不用望远镜就能从地球上看到。
It's not known when Mars was found and by whom Mars has been known for a very long time, and one of the planets that can be seen from the Earth without a telescope.
我们的夏天很短但是冬天很长，在十二月，也就是最黑的时候，我们的一天中只有很短的时间可以看到微弱的阳光。
Our summers are short and our winters long.In December, when it is darkest, we only have a few hours of very weak sunlight per day.
我们的夏天很短但是冬天很长，在十二月，也就是最黑的时候，我们的一天中只有很短的时间可以看到微弱的阳光。
Our summers are short and our winters long. In December, when it is darkest, we only have a few hours of very weak sunlight per day.
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