必然概念是有歧义的，并可区分出不同种类的必然性，如逻辑必然性和事实必然性。
The conception of necessity has its ambiguity, and can be divided into different kinds of necessities, such as logical necessity and factual necessity.
若要区分运行时的多个版本，或消除具有相同名称的多个应用程序的歧义，也必须修改注册表项。
To differentiate multiple versions of the runtime, or to disambiguate multiple applications with the same name, you must also modify a registry key.
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