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。

youdao

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。

youdao

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。

youdao

Since scarcity is the basic economic problem, if it does not exist then there is no reason for my economics course.

FORBES: We're All Economists Now: Scarcity Lessons For High School Students

By doing so, Pascal argues, if it turns out that God exists you will spend eternity in heaven, but if it turns out God does not exist, you will have lost nothing.

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Olson says that sort of generalized damage is not adequate to make the legal case: "If it does exist, it is damage to humanity in general, not to Massachusetts, " he says.

NPR: Supreme Court Hears Global Warming Arguments