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1·The theory supposes the existence of life on other planets.

这个理论假定其他行星存在生命。《牛津词典》

2·This has led scientists to speculate on the existence of other galaxies.

这就使得科学家推测还有其他星系存在。《牛津词典》

3·Atheists deny the existence of God.

无神论者否定上帝的存在。

4·From this information, he was able to confirm the existence of a pattern.

从这些信息中，他能够确认一种模式的存在。

5·Perhaps this can partly explain the existence of left-handers in human societies.

也许这可以部分解释人类社会中左撇子的存在。

6·Researchers recently found kimberlite deposits hinting at the existence of diamonds.

研究人员最近发现了金伯利岩矿床，这暗示着钻石的存在。

7·Space-probe photographs indicate the existence of giant volcanoes on the Martian surface.

太空探测照片显示火星表面存在巨大的火山。

8·Some scientists don't deny the existence of aliens, but further evidence is still needed to confirm it.

一些科学家并不否认外星人的存在，但是需要进一步的证据来证实。

9·Sporting advantage notwithstanding, therefore, the existence of left-handedness poses a problem for biologists.

因此，尽管具有体育优势，左撇子的存在给生物学家提出了一个问题。

10·A still picture could only imply the existence of time, while time in a novel passed at the whim of the reader.

一张静止的照片只是暗示了时间的存在，而小说中的时间则随着读者的幻想而流逝。