If they do, then they cannot exist, simple as that.
如果会导致矛盾，那么它们就不能存在了，就这么简单。
If these files already exist, make backups before you continue with this exercise.
如果这些文件已经存在，在您继续这个练习之前请进行备份。
If the world were clear, art would not exist.
如果世界是清晰的，艺术则不会存在。
If one does not exist, the container supplies one.
如果不存在，则容器提供一个事务。
If they exist, make a point of going.
如果它们存在，做一个去点。
And, we say that a function is differentiable if these things exist.
我们说一个函数是可微的，如果这些偏导数存在。
You need to create this file if it does not exist.
如果这个文件不存在，就需要创建它。
If they exist, each string would be as thin as a proton, but incredibly dense.
如果宇宙弦存在，每根弦都像质子一样小，密度却极大。
A report can be generated to see if any major issues exist.
可以生成一份报告来查看是否存在任何重大问题。
Lies only exist if we believe in them.
谎言只有我们愿意相信，它才会存在。
If the path does not exist, the script will attempt to create it.
如果上述路径不存在，脚本将尝试创建它。
If this package does not already exist, it is created.
如果这个包已经不存在，就创建一个。
If the unit does not exist, put it into the set.
如果单元尚未存在的话，那么您可以将其置于系列之中。
If it does not exist, just accept the default value to create it.
如果不存在，只需要接受默认值就可以创建。
It merely describes what one would be like if it were to exist.
它只描述了如果文档存在，那它会是怎么样的。
It is hard to imagine that our world as we know it, and all that is familiar to us, would likely not exist if not for the Moon.
很难想象，如果不是月球，我们现在所知的这个世界，以及对我们来说非常熟悉的一切，很可能不存在。
If aliens exist, where are they?
如果外星人存在，他们会在哪里呢？
The next unit of water might not even exist if we cannot get smart enough to use our single supply of water well.
如果我们不能有效使用我们仅有的水资源的话，那么下一个单元的水将不复存在。
So, if it didn’t exist already how was it made later?
所以，如果最开始钱并不已经存在，那后来是怎么被弄出来的？
If these people exist, we will not be able to afford them.
即使存在这样的人，我们也负担不起。
If such a control doesn't exist, the page object is set as the parent.
如果这样的控件不存在，页面对象被作为父对象。
The next block creates the backup directory if it does not exist.
下一个块在备份目录不存在时创建该目录。
So, if it didn't exist already how was it made later?
所以，如果最开始钱并不已经存在，那后来是怎么被弄出来的？
If the letters didn't exist, they ought to exist, so we'll write them.
即使找不到这些书信了，它们也应该存在过，那么我们来写吧。
If he file does not already exist, the installation application creates it.
如果此文件不存在，安装程序会创建它。
That's good advice, even if these approaches didn't exist.
即使不存在这些方法，这也是一个很好的建议。
If this directory doesn't already exist, create it.
如果此目录不存在，就创建它。
If it does exist, we will use the new value and reexec.
如果存在，则使用新的值并重新执行。
If it does exist, we will use the new value and reexec.
如果存在，则使用新的值并重新执行。
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