This overhead does not exist when reading full XML documents from a CLOB where the XML is already stored in text form.

当从CLOB(在clob中xml本来就是以文本形式存储的)读取完整的XML文档时，不存在此开销。

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Dynamic text elements are most often used to display CLOB data type values.

动态文本元素经常用来显示CLOB数据类型值。

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Datatypes like VARCHAR and CLOB allow you to store plain ASCII text, and BLOBs provide for storage of complex (proprietary) types of data, like.pdf,.doc,.ppt,.rtf,.xml and so on.

诸如VARCHAR和clob之类的数据类型允许您存储无格式ascii文本，而BLOB数据类型允许存储复杂(专有)类型的数据，如. pdf、。doc、。ppt、。rtf、。xml等。

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