1·Is there life on Mars?
火星上有生命吗?
—— 《柯林斯英汉双解大词典》
2·The atmosphere of Mars could not support life.
生命无法在火星的大气环境下生存。
—— 《牛津词典》
3·Mars and Earth have orbits which change with time.
火星和地球的轨道随着时间而发生改变。
—— 《柯林斯英汉双解大词典》
4·Mars was visible, dead in the centre of the telescope.
火星清晰可辨,正好就在望远镜的中心。
—— 《柯林斯英汉双解大词典》
5·Mars takes longer to revolve on its axis than the earth.
火星自转一周的时间比地球长。
—— 《牛津词典》