没有行星,就没有生命。
Currently there have been no such planets discovered, but they are very likely to exist.
目前尚未发现这样的行星,但它们很可能确实存在着。
Many of the planets are no doubt inhabited by some form of advanced life.
许多行星上不容置疑地存在着高级的生命形式。
So far there is no proof that spaceships from other planets do exist.
迄今为止,没有证据表明来自其它行星宇宙飞船确实存在。
The scientist made the assumption that there is no animal life on other planets.
这个科学家提出了其他星球上没有动物生命的假设。
The scientist made the assumption that there is no animal life on other planets.
这个科学家提出了其他星球上没有动物生命的假设。
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