Property sheets provide reusable sets of field definitions.

属性表提供可重用的字段定义集。

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Without the deferred processing, you could run into a situation where just processing the basic field definitions for a generic template would require instantiating a version of that template.

如果没有延迟处理，就会发生这样的情况：仅仅对泛型模板的基本字段定义进行处理，就会引起对这个模板的同一版本的实例化。

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Otherwise, leave a field blank for it to revert to its default value (definitions of the fields follow).

否则，保留该字段为空，以转为其缺省值(按照字段定义)。

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