In any case, failure to find fossils of a predicted kind does not rule out their existence in an undiscovered deposit.

在任何情况下，没有发现预测到的化石并不表示它们不存在于未发现的矿床中。

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That such deep events do occur has been accepted only since 1927 when the seismologist Kiyoo Wadati convincingly demonstrated their existence.

直到1927年地震学家 Kiyoo Wadati 证明了这种深度地震的存在，人们才承认这种现象确实存在。

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Aggression is a kind of innate survival mechanism, an instinct for self preservation, that allows animals to defend themselves from threats to their existence.

攻击性是一种天生的生存机制，一种自我保护的本能，使动物能够保护自己不受生存威胁。

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Evidence of their existence has been found in more than two thousand five hundred places so far.

VOA: special.2009.10.07

We prove their existence by using our five senses.

我们可以通过我们的五感来证明它们的存在

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But, in the meantime, what you have is the continual reproduction of that yell, that laugh, that "wow," that "yes," that "that's all right," all those things that they say just to register their existence and their relation with one another.

但同时，你听到看到的只是不断重复的,叫喊，笑，“哇“，“是“，“对极了“,所有这些都只是用来显示他们的存在,和他们之间的关系。

耶鲁公开课 - 1945年后的美国小说课程节选

Dictators installed by the West stoked these flames into an inferno to justify their existence.

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Several children began gathering around him while he stood there oblivious to their existence.

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Earlier this year, though, an Italian experiment did see something that suggested their existence.

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