If they exist, make a point of going.
如果它们存在，做一个去点。
The screen components layout, if they exist
屏幕组件布局（如果它们存在的话）
We easily come to doubt if they exist.
我们很容易怀疑它们是否存在。
Also I didn't want to see other translations, if they exist.
还有，我不想看到别的翻译，如果他们存在的话。
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。
These organisms, if they exist, are most likely to be found in groundwater.
这些生物体，如果存在的话，最可能会在地下水中找到。
Frequently, developers want to call new functions if they exist on the host version.
开发人员常常想要调用新的函数(如果它们存在于主机的Windows版本上的话)。
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 aliens exist, where are they?
如果外星人存在，他们会在哪里呢？
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 they're users themselves, they exist in an environment controlled by managers.
如果他们本身就是用户，那他们就处于由经理们控制的环境中。
Create the tables (if they do not already exist).
创建表(如果还不存在的话)。
First, we must postulate that if souls exist, they must have some mass.
第一，我们必须假定灵魂存在，他们必须保有物质。
The questions are, do such genes exist, and what are they if they do?
问题是这种智商基因确实存在吗？
Great difficulties would arise if they did not exist.
如果没有他们，那就将发生极大的困难。
But if you only focus upon the conditions as they exist, nothing will change.
但是如果你只专注于现实存在的情况，一切都不会改变。
We do not even know if they still exist, " insisted Arvid."
我们甚至不知道它们是否还存在。
Creates the online redo log files if they do not currently exist.
联机日志损坏，不能做完整修复时，用的。
Creates the online redo log files if they do not currently exist.
联机日志损坏，不能做完整修复时，用的。
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