1.Because large business printers have hard drives that store document images, and those images could contain sensitive data.
这是因为大型的商用打印机有一个储存文档影像的硬盘，而这些影像可能会包含敏感信息。
2.You can store document source in the symbol store and retrieve it through this interface.
可在符号存储中存储文档源，并通过此接口检索该文档源。
3.You can optionally store document source in the symbol store.
还可以选择在符号存储区中存储文档源。