| 1. | The surface of mars is remarkably diverse .
火星的表面参差不齐。 |
| 2. | They may solve a number of problems about mars .
它们可能解释一些关于火星的问题。 |
| 3. | The diameter of mars is slightly over half that of the earth .
火星的直径比地球的半径稍大些。 |
| 4. | The russians plan to put a satellite into orbit round mars .
俄国人计划把一颗人造卫星送入环绕火星的轨道。 |
| 5. | It will be a very long time before any landing on mars can be attempted .
人类还得等很长一段时间才能作登上火星的尝试。 |
| 6. | If a satellite can one day be put into orbit round mars , scientists will be able to find out a great deal .
如果有一天，人造卫星能被发射到围绕火星的轨道上去，科学家们将会发现很多情况。 |
| 7. | If the picture are successful , they may solve a number of problems about mars and provide information about the wales on it .
如果图象摄取成功，它们可以解决许多有关火星的问题，而且能提供关于火星表面上的条痕的资料。 |
| 8. | By now , a rocket will have set off on its 35 million mile trip to mars and scientists must be waiting anxiously for the results .
此刻，一枚火箭可能已经出发，踏上飞向火星的3500万英里的旅程，科学家们一定在焦急地等待着结果。 |
| 9. | Mars ' s carbon dioxide atmosphere is extremely thin
火星的二氧化碳气层非常的薄。 |
| 10. | The atmosphere on the surface can ' t support life
火星的大气没法支持生命的 |
