Both rovers will function as robotic geologists, examining rocks and soil for clues about whether past environments at their landing sites may have been hospitable to life.

两辆火星车将作为机器人地质学家，研究岩石和土壤，以搜索它们着陆地在过去的环境下是否适于生物生存。

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Whether past, present, future, always give you the warm care, may you be the most happy man.

无论是过去，现在，将来，一直给你最暖的关心，愿你成为世界上最开心最幸福的人。

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But the secretary also said senior officials are aware that past efforts have failed, and he said it is not clear whether the view in Tehran has changed.

VOA: standard.2009.05.05

If you focus on some of the minutia of a site like this, you know, it's useful to be able to jump to a particular date whether in the future or in the past.

如果你关注像这样一个网站的一些细节，你会发现，若能跳转到,不论过去还是将来的一个特定日期，那将是很有用的。

哈佛公开课 - 计算机科学课程节选

So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.

因此这个句型要根据不同的时态，如过去时、现在时和将来时，作出一点调整；另外也会根据是否是问句而略有不同。

There is 课堂 - SpeakingMax英语口语达人

This running study attempts to answer the question of whether past performance is an indication of future results.

FORBES: Past Winning Funds Fall Again

Indians disagree whether the past decade of halting reform has reduced poverty.

ECONOMIST: India��s choices

Very few scientists think Greenland would be stable in an Arctic with little or no summer sea-ice, and opinion is split as to whether it is past its tipping point already.

FORBES: Breaking News: The Climate Actually Changes!