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1·Its tallest volcano, long extinct, is Olympus Mons.

它最高的火山是已死很久的奥林匹斯山。《柯林斯英汉双解大词典》

2·Orbiting spacecraft have shown a huge mountain on Mars called Olympus Mons.

轨道飞船显示了火星上的大山，叫奥林庇斯山。

3·The authors describe the magnificent scenery on Mars including Olympus Mons, more than 20,000 metres high and the solar system's biggest volcano.

作者描绘了火星上的奥林匹斯山，其中包括2万多米高，太阳系最大的火山壮丽的风景。

4·Mars has some incredible surface features, such as Olympus Mons; a mountain over 24km higher than its surroundings and with a 250km radius (slightly under the distance between Paris and Brussels).

火星表面有一些令人难以置信的奥林匹斯山等功能；比24公里高于周围环境，并以250公里半径山(略低于的巴黎和布鲁塞尔之间的距离)。