有水存在的火星对于科学家来说是一个热门的话题。
The presence of water on Mars is a hot topic for scientists.
对于科学家来说，你可以给出几段的技术上的解释。
For a scientist, you can give a technical explanation in a few paragraphs.
对于科学家来说，从运动的观点看问题是很重要的。
It is important for a scientist to look at matter from the viewpoint of movement.
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