He thought that if he couldn't see something, it didn't exist.
他认为如果他看不见某种东西，它就不存在。
Like an ostrich, she thought that if she couldn't see me, then I don't exist.
就像只鸵鸟一样，她以为如果她看不见我，那么我就不存在。
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。
If he does not exist, everything depends on us.
如果他不存在，一切将由我们而定。
If one does not exist, a SQL0286N error will be returned to the user or application.
如果不存在这样的标空间，则将向用户或应用程序返回SQL 0286n错误。
If the database does not exist, an empty database is created.
如果该数据库不存在，则创建一个空数据库。
If two libraries exist that define conflicting members, the members are aggregated and noted in the user interface where relevant.
如果存在两个定义冲突成员的库，则在相应的用户接口中聚合并注释这些成员。
If different versions exist, there are structural changes between the baselines, as shown in Figure 19.
如果有不同的版本存在，那么在基线之间将会有结构性的改变，如图19所示。
If the file does not exist, the installation application creates it.
如果此文件不存在，安装程序会创建它。
We know that rational knowledge exists before experience, so if to exist is to experience we must always have both sources of knowledge.
我们知道理论知识是先于实践而存在的，所以如果存在就是能感知，我们必须既有理论，又有实践。
The fourth quadrant (prudent and inadvertent) seems like it shouldn't exist - if you are prudent, how can it be inadvertent?
第四象限(谨慎、无意)似乎是不存在的—如果您是谨慎的、您有怎么可能疏忽呢？
If they don't exist, then you'll want to develop some, or better yet, adopt existing ones from industry.
如果不存在，那么您希望开发一些，或更好的是，采用现有的行业标准。
As the name suggests, it draws a line between the two airport markers if they both exist.
顾名思义，它在两个机场标记之间画一条线(如果它们都存在的话)。
Although software has become ubiquitous and critical for our daily existence, the fundamental laws of software development, if they exist, have yet to be discovered.
虽然软件对于我们的日常生活已经变得普遍存在并具有决定性，但是软件开发的基本准则，如果存在的话，还没有被发现。
The point is, "people must value your expertise," so much so that if you didn't exist their lives would be inconvenienced.
关键在于：人们要认为你的专长具有价值，以至于如果没有你的存在他们的生活将会产生不便。
If the path doesn't exist, DB2 installer creates it during installation.
如果这个路径不存在，DB 2安装程序会在安装期间创建它。
Both of these methods return an empty string if the attribute doesn't exist.
如果属性不存在，那么这两种方法都将返回空字符串。
For example, if multiple namespaces exist, the user will be required to select a namespace.
例如，如果存在多个名称空间，就要求用户选择一个名称空间。
This announcement is usually intoned solemnly, as if information did not exist in other ages.
人们经常庄严宣颂这个声明，就好像在其他的时代不存在信息一样。
These, if they exist, would be fossil traces of black holes from the pre-Big Bang version of reality.
如果存在的话，那么这些“大圈”便是“前大爆炸”所产生的宇宙中黑洞的“化石”。
The superblock is typically stored on the storage medium but can be created in real time if one doesn't exist.
超级块通常存储在存储媒体上，但是如果超级块不存在，也可以实时创建它。
You first drop the tables, if they exist, so that you can cleanly create new tables with the exact column definitions you need.
如果存在的话，首先放弃这些表，以便您可以用所需的正确的列定义创建新表。
Listing 6 shows the syntax that checks to see if the files exist.
清单6显示了用来检查该文件是否存在的语法。
Would my love still exist if your eyebrows changed your eyes changed your smell changed and your voice changed?
如果你的眉毛变了，眼睛变了，气息变了，声音变了，爱情是否还存在？
If it doesn't exist, you need to create a service interface for your compensation service.
如果它不存在，则需要为补偿服务创建服务接口。
Returns an error if the key does not exist.
如果键不存在，就返回错误。
If the file doesn't exist, it's treated as having zero lines.
如果文件不存在，则认为它有零行。
"So if they can't exist under the new conditions they literally fall off the continent," he says.
如果在新的环境不能生存的话，它们将逐渐消失。
This suggests that if there exist arbitrage opportunities in the field of commodity, it is almost impossible to prevent people from doing that.
这表明，如果商品领域中存在套戥机会，几乎很难防止有人不这样做。
This suggests that if there exist arbitrage opportunities in the field of commodity, it is almost impossible to prevent people from doing that.
这表明，如果商品领域中存在套戥机会，几乎很难防止有人不这样做。
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