A replicator must exist long enough to be able to get copied, and transfer its information.
复制因子必须存在足够久，才能被复制并传递信息。
Some people believe that there may not exist a stress gap between men and women.
有些人认为，男性和女性之间可能不存在压力差距。
Pyramids, cathedrals, and rockets exist not because of geometry or thermodynamics, but because they were first a picture in the minds of those who built them.
金字塔、大教堂和火箭的存在并不是因为几何形状或热力学，而是因为它们首先是建造它们的人的脑海中的图画。
When a property owner discovers that oil or natural gas exist beneath property for which a title has been legally and completely obtained, rights to the embedded minerals can be leased to others.
当财产所有人发现在已经合法和完全获得所有权的财产下面存在石油或天然气时，对埋藏在其中的矿产的权利可以出租给其他人。
In reality the bell does not exist; it is only a fancy that people have taken into their heads!
实际上，钟并不存在；这只不过是人们脑子里的一种幻想罢了！
To make calculations manageable even by computers, most of the models suppose either that the oceans are a motionless swamp or that they don't exist at all.
为了使计算机也能进行计算，大多数模型要么假设海洋是一个静止的沼泽，要么假设它们根本不存在。
Earth is a rocky planet where there is liquid water, which is necessary for life to exist.
地球是一个岩石行星，这里有液态水，这是生命存在的必要条件。
In reality, that "handsome prince" we seem to be promising is in good company with Santa Claus and the Easter Bunny—nary a one of them seems to exist.
在现实中，我们似乎一直在期待的那位“英俊的王子”和圣诞老人、复活节小兔子是一类人——没有哪一个是真实存在的。
Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.
最近的发现有力地支持了这样一种理论，即银河系中心，和宇宙中估计存在的1000亿个其他星系中的许多里有一个黑洞。
Research opportunities exist in a wide range of areas.
研究机会存在于广泛的领域中。
If society is to exist as a unity, its members must have shared values.
社会若要成为一个统一的群体，它的成员就必须有共同的价值观。
The explanation is that each aspen while appearing to exist separately as a single tree, is in fact only the stem or shoot of a far larger organism.
对此的解释是，每一棵白杨，虽然看起来是独立存在的一棵树，但实际上只是一个巨型有机体的茎或芽。
Such a hierarchy may also exist in plants.
这种等级结构也可能存在于植物中。
First, a climate conducive to life on Earth depends upon the extraordinarily narrow orbital parameters that define a continuously habitable zone where water can exist in a liquid state.
首先，地球上适宜生命存在的气候取决于极其狭窄的轨道参数，这些参数定义了一个持续可居住的地带，在那里水可以以液态存在。
The Atlantic Monthly has long attempted to provide a design environment in which two disparate traditions—literary and journalistic—can co-exist in pleasurable dignity.
《大西洋月刊》长期以来一直试图提供一种设计环境，让文学和新闻两种不同的传统保有尊严、愉悦共存。
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