You can't imagine a world in which a exists but a doesn't exist.
你无法想象一个A既存在又不存在的世界。
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。
Karolina Kurkova, a Victoria's Secret Angel, is perfect in every way, except she is missing a belly button. Her navel simply does not exist.
《维多利亚秘密》里的天使卡洛利娜·库尔科娃每个方面都很完美，但她却没有肚脐眼。她的肚脐根本不存在。
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。
Some people exist on melons or coconuts for weeks at a time.
有些人一度数周靠各种瓜与椰子生存。
These rules provide more detailed information about the relationships and restrictions that exist on the columns of a nickname.
这些规则提供了更详细的信息，是关于存在一个昵称各个列的关系和约束。
One of the easiest ways to segment a market is to magnify gender differences or invent them where they did not previously exist.
细分市场最简单的方法之一是放大性别差异，或者在以前不存在性别差异的地方创造性别差异。
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。
The imbalance between work and life simply doesn't exist anymore. The concept of work-life balance contributes little to a fulfilling life.
工作和生活之间的不平衡不复存在。保持两者的平衡对过上美满充实的生活并没有什么帮助。
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。
The semiarid lands bordering the deserts exist in a delicate ecological balance and are limited in their potential to adjust to increased environmental pressures.
沙漠边缘的半干旱土地处于非常脆弱的生态平衡之中，而这些半干旱区域对于持续增加的环境压力的适应能力极其有限。
These different parts of a rainforest exist together to create an ecosystem for many animals, plants and human beings.
雨林的这些不同部分共同存在，为许多动植物以及人类创造了一个生态系统。
That twenty-one ceramic dog figurines were discovered during the excavating of a 1,000-year-old Hohokam village in Tempe, Arizona, has nearly doubled the number of these artifacts known to exist.
在对亚利桑那州坦佩的霍霍坎村进行挖掘时，发现了21件陶制狗像，这使得已知的狗像数量增加了近一倍。
语句可能不存在。
A community must already exist.
社区必须是已经存在的。
You might say, why should a company exist for the shareholders?
你可能问，公司为何要为股东存在呢？
If they exist, make a point of going.
如果它们存在，做一个去点。
A mechanism must exist by which a completed form can be submitted for processing and storage.
必须存在一种机制，可以按照该机制提交已完成的表单，用于处理和存储。
This could easily exist within a browser.
这在浏览器中很容易存在。
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