RDF并不严格要求特性名的名称空间，但极力建议将它作为消除这些名称的歧义的方法。
Namespaces on property names are not strictly required for RDF, but are highly recommended as a way to disambiguate such names.
随着航空发动机技术的发展，对滚珠轴承的速度特性要求也越来越高。
With the development of aeromotor technology, more strict speed performance of ball bearing is required.
您的组织有一个安全策略要求有这种特性。
Your organization has a security policy that requires this feature.
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