1、  By now, a rocket will have set off on its 35million mile trip to Mars and scientists must bewaiting anxiously for the results.

现在，一枚火箭可能已经开始了它的三千五百万英里的火星之行，科学家们一定在焦急地等待着结果。

On one’s … trip to..

2、  It will be a long time before any landing on Mars can be attempted.

在登上火星任何尝试之前还会有相当长一段时间。

3、  An interesting suggestion for measuring the atmosphere around Marshas been put forward.

有人已经提出一项测量火星周围大气层的颇为有趣的建议。