Provides storage for text and services to manipulate it but does not support format attributes and cannot be displayed.
为文本提供存储，使服务可对其进行操作，但不支持格式属性也不能被显示。
Provides storage for text and services to manipulate it but does not support format attributes and cannot be displayed.
为文本提供存储，使服务可对其进行操作，但不支持格式属性也不能被显示。
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