当你得知我们所知道的餐馆只存在了几个世纪，你可能会感到惊讶。
It might surprise you to learn that restaurants, as we know them, have only existed for a few centuries.
随着科技的发展，许多过去只存在于科幻小说中的东西被带入了我们的日常生活。
With the development of technology, many things which only existed in science fictions are brought into our daily life.
迄今为止，只存在最薄弱的公共资助医疗和养老金系统，这加强了人们在工作时储蓄的动机。
There is, to date, only the flimsiest of publicly-funded health care and pension systems, which increases incentives for individuals to save while they are working.
超级女人只存在于记者和好莱坞制片人的脑子里。
Superwoman exists only in the minds of journalists and Hollywood producers.
化学不是只存在于实验室里的东西，它是你会在生活中遇到数百次的东西。
Chemistry isn't something that just lives in a laboratory, it's something that you meet hundreds of times in life.
对于这些难民来说，家只存在于他们的梦境之中。
科学家们还使用DNA技术来确保药物只存在于蛋白中。
The scientists also use DNA technology to make sure that the drugs are only inside the egg whites.
欢乐不应该是从孩子身上训练出来的，也不应该只存在于课后活动。
Joy should not be trained out of children or left for after-school programs.
现在关于这个遗址的一个谜团是，考古记录表明，它只存在了几个世纪。
Now, one mystery regarding this site is that archaeological records show it was inhabited for only a few centuries.
动物体内的大部分脂肪是用来储存能量的，但是你在海豚体内发现的这种脂肪，只存在于鼻疣和下颌周围。
Most of the fat that you find in an animal's body is used for storing energy, but this fat, which you find in dolphins, and only in the melon and around the lower jaw.
该研究小组找出了39个传统行为，一些群体有这些行为，但另一个群体却没有。当时，这种模式只存在于人类之中。
The team identified 39 of these traditions that are practiced by some communities but not others. This is a pattern that, at the time, hadn't been seen in any animal except humans.
总之，如果只存在一个唱片，我就选择它。
然而，这个国会只存在了两年。
只存在相对的圆的东西。
There are only things that are circular to a greater or lesser degree.
单一实例指的是旨在让应用程序中一次只存在一个实例的类。
Singletons are classes that are designed to have only one instance existing at a time in an application.
大多数都把它封装在显示屏中，或者只存在文字稿或幻灯片上。
Most are sealed inside display cases or exist only in press releases or PowerPoint presentations.
我们不能假设只存在两种解释：随机过程和智慧设计。
It is wrong to insinuatethat the field of explanations consists only of random processes ordesigning intelligences.
理论预言，这个几乎无法理解的状态只存在了宇宙第一秒钟的极小一段时间。
This nearly incomprehensible state is theorized to have existed for just a fraction of the first second of time.
鲍勃从来都只存在我的脑子里，但他却是我所能拥有的最有趣的男朋友。
Bob never existed outside my head yet he was the most amusing boyfriend I could have possibly had.
它保证每个缓存中只存在每个对象的同一版本，除非使用了一个近缓存。
It guarantees everyone's cache sees the same version of each object, except when a near cache is used.
但是如果市场上只存在有限数量的生产者和消费者时，市场仍然存在某种失灵。
There can still be a market failure, however, if there are a limited number of buyers and sellers.
不需要使用SQL，但需要确保数据已存储并且可以检索，只存在少许不同。
No SQL is used, but rest assured that data is being stored and can be retrieved, albeit just a bit differently.
我们可怕而无法忍受的城市条件，源于对不断恶化的条件只存在缓慢而小规模的干预。
The dire and unbearable conditions of our cities are a result of slow and small-scale interventions to ever worsening conditions.
分割HTTP测试脚本的步骤类似于前面在SAP中所描述的步骤，只存在一点的差异。
The steps for splitting an HTTP test script are similar to those listed previously for SAP, with only a few differences.
因为源或目标必须为通用业务对象，而且每个关系中只存在一个托管角色，因此不需要托管角色名称。
Because either the source or the target must be the generic business object and only one managed role exists per relationship, the managed role name is not needed.
对于消息流实例的所有节点而言，只存在环境树的一个副本，消息树将被复制到所传播到的每个节点。
Only one copy of the Environment tree exists for all the nodes of the message flow instance but for Local Environment, the message tree is copied for every node it is propagated.
如果黏菌是在将近10亿年前来到陆地上的话，他们很可能对当时只存在细菌的大陆进行了殖民。
If slime molds arrived on land close to a billion years ago, they may well have colonized continents that were home only to films of bacteria.
视角这个名词是一种抽象概念，它为某一系统提供某种规范，且这一系统只存在某一系列的特定问题。
The notion of viewpoints is an abstraction that provides a specification of a system, limited to a particular set of problems.
该行业的极端资本集约度是外人进入的阻碍，从理论上说只存在少量供应商的市场是操纵起来成熟的。
The industry's extreme capital-intensity is certainly a barrier to entry, and in theory a market with only a few suppliers is ripe for rigging.
该行业的极端资本集约度是外人进入的阻碍，从理论上说只存在少量供应商的市场是操纵起来成熟的。
The industry's extreme capital-intensity is certainly a barrier to entry, and in theory a market with only a few suppliers is ripe for rigging.
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