几十年来,人类为了探索火星的奥秘,已经向这颗红色星球发送了许多探测器。这些探测器有的已经登陆火星表面,有的是在围绕火星飞行。它们为人类带来了火星表面壮观、迷人的近距离特写照片。现在考考你的眼力,下面两张并排的照片中,你知道哪张是地球,哪张是火星吗?右为地球:是宇肮员从太空中拍到的阿尔及利亚境内的沙丘。左为火星:这是火星上一座十分独特的山谷,可以在谷底看到巨大的水平山脊线和许多垂直的小沙丘。 For decades, humans have sent many probes to this red planet to explore the mysteries of Mars. Some of these detectors have landed on the surface of Mars, some flying around Mars. They bring spectacular, captivating, close-up close-up photos of the planet’s surface to humans. Now consider your eyesight. In two photos below side-by-side, do you know which one is Earth and which one is Mars? The Right is Earth: the sand dune of Algeria, captured by Uzbekistan in space. Left for Mars: This is a very unique Mars on the valley, you can see in the bottom of the huge horizontal ridgeline and many vertical small dunes.