您要查找的是不是：
- Does life exist on Mars? 火星上有生命吗?
- Does life exist on other planets? 别的行星上有生命吗?
- Does life exist on the moon? 月球上存在着生命吗?
- If people ever do live on Mars they will rely on hydroponic farms for food. 如果人类都能在火星上生活了，那么他们将会依靠培养液农场来培育食物。
- The question of whether life exist on other planet preoccupied the boy's mind. 那男孩心中老是想著其他星球上是否存在生命这一问题。
- Eons passed before life existed on the earth. 经过数不清的年代以后, 地球上才有人类。
- Nasa has found what it calls “strong evidence” that life once existed on Mars after re-examining a meteorite. 近日，美国宇航局发现火星曾存在生物体的“有力证据”，这一结论是在该机构对一枚陨星进行重新检测后得出的。
- I can't imagine that life exists on that faraway planet. 我无法想象在那遥远的星球上有生命。
- These grainy photographs may be the first evidence that liquid water can exist on Mars. 这些画质粗糙的照片可能是火星上存在液态水的第一个证据。
- The question of whether life exists on other planets preoccupied the boy's mind. 那男孩心中老是想著其他星球上是否存在生命这一问题。
- The question of whether life existed on other planets preoccupied the boy's mind. 那男孩心中老是想著其他星球上是否存在生命这一问题。
- Odyssey does not carry instruments that can search for life on Mars. 奥德赛号没有携带可以探索火星存在生物的仪器。
- The question of whether life existed on other planets preoccupied the boy 's mind. 那男孩心中老是想著其他星球上是否存在生命这一问题。
- Moreover, scientists cannot quantify the likelihood that life exists or once existed on planets other than Earth. 另外，现在或过去是否有生命存在于地球以外的行星?
- Scientists assume there is no animal life on Mars . 科学家们假定火星上没有生命存在。
- Are you quite sure there is no living beings on Mars? 你十分肯定是在火星上没有生物吗？
- The living thing on the earth can not subsist on mars. 地球上的生物不可能在火星上生存。
- It is very likely that there were no life on mars. 非常可能，金星上没有生命。
- They seem to exist on a different spiritual plane. 他们似乎生活在不同的精神境界。
- Whether there is life on mars is a question. 火星上有没有生命是个问题。
