1.Hundreds to thousands of mitochondria exist in each human cell, occupying up to a quarter of their cytoplasm.
成百上千个存在于人类细胞中的线粒体占据了整个细胞质的四分之一。
2.A user should be totally unaware of whether or not the database is distributed (whether parts of the database exist in multiple locations).
一个用户应该完全觉察不到数据库是如何分布的（不管部分数据库在许多位置存在）。
3.Our military has put the terror training camps of Afghanistan out of business, yet camps still exist in at least a dozen countries.
我军已经将阿富汗境内的恐怖训练营捣毁，但这样的训练营还遍布在其他十几个国家中。
4.Normally atomic nuclei exist in an equilibrium or stable condition known as their ground state of energy.
通常，原子核存在于能量为基态的平衡态或者说稳定的条件下。
5.In fact, the third signal flag (from left to right as you face the front door) does not exist in international nautical code.
事实上，第三面信号旗（当你面朝蟹堡王时从左到右数）在国际航海代码中并不存在。
6.Model is also pretty easy to understand: business processes and objects exist in this layer.
模型也是很容易理解的：业务逻辑和对象都处于这个层。
7.on which water can exist in liquid form of the surface.
水能以液态的形式存在于其表面的。
8.The question of how many rocky worlds exist in the galaxy has perplexed astronomers for the better part of a century.
在大半个世纪里，银河系有多少岩石星球的问题一直困惑着天文学家们。
9.The fact is, though, that they are going to have to continue to do that if the euro is going to continue to exist in its current form.
虽然事实上如果欧元将持续作为当前的货币形式存在的话，他们不得不这么做。
10.Must be able to exist in a primitive environment. This includes having a thick ear small for the size of the head.
必须能在原始的环境中生存。包括拥有一个和头的比例相对而言比较小的耳朵。