The popular PDF document format has made the Adobe Reader software virtually ubiquitous.
PDF格式文档的普遍流行使得AdobeReader软件几乎在所有操作系统中无处不在。
A: You can upload the PDF document to Zamzar and convert it any formats like doc, html, png, txt or rtf (rich text format).
A：你可以将PDF文件上传到Zamzar，它可以将文件转成doc、html、png、txt、rtf。
The printing is based on behind-the-scenes export to PDF so it is the generated PDF document that is actually sent to the printer.
打印的实际上是后台导出到PDF，因此实际上是后台生成的PDF文档被发送到打印机，而非网页显示的内容。
Each course is further divided in modules, each module coming with study material (a PDF document), and offers the option for self-assessment.
每门课程都进一步分为多个单元，每个单元都有学习资料（PDF文档），并且提供了自我评价的方法。
The iText library contains classes to generate PDF text in various fonts, generate tables in PDF document, add watermarks to pages, and so on.
iText 库中的类用于以各种字体来生成PDF文本、在 PDF文档中生成表格、为页添加水印等。
Several document information hiding algorithms are brought forward, based on analysis of PDF document structure.
通过分析PDF文档结构，提出了几种实用的文本信息隐藏算法。
Several document information hiding algorithms are brought forward, based on analysis of PDF document structure.
通过分析PDF文档结构，提出了几种实用的文本信息隐藏算法。
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