US:/ˌpi di ˈef/
UK:/ˌpiː diː ˈef/
n.:
可移植文档格式
网络:
下载；文件格式；可移植文档格式(Portable Document Format)
Examples
1.
Smith later said he couldn't recall the grade given to his paper, but he guessed it was his "usual gentlemanly C" (. pdf file).
史密斯后来说，他记不得论文的得分了，不过他猜想总归是他常得的“体面的C”吧。
2.
Easy to understand and printable User's Manual in PDF format as well as online help.
很容易了解的使用者说明和线上帮助并且是可列印的PDF档案。
3.
Before you begin, you may wish to download a pdf file of the Extreme Presentation Method overview and print it out.
在开始之前，您不妨下载“终极演示方法”概述的pdf文档，并将其打印出来。
4.
The Gates Foundation has given out eight grants (here's the list as a PDF) to universities that are trying to dream up a toilet 2. 0.
盖茨基金会已经分发了8个补助金（这里有具体的名单），给正在尝试设计便桶2.0的大学。
5.
To read more on this neat bit of financial engineering, check out this research paper (. pdf file).
想在财务上看得更明白可以查看这份研究报告。
6.
Well, it depends on what you know about the measurements' probability density function (PDF).
它依赖于您对度量值的概率密度函数（probabilitydensityfunction，PDF）的认识。
7.
If you aren't able to open these PDFs, it is likely that you do not have Adobe Reader installed on your computer.
如果您打不开这些PDF文件，可能是没有安装这个程序。
8.
The report should be in PDF format, we think, though there might be a web form as well.
我们认为报告应该是PDF格式的，虽然也有可能有一个web表单。
9.
As a result, this site gained new readers, and I got to correspond with Ramit about how to produce a PDF book.
结果，站点得到了新读者，而我也开始跟Ramit联系，了解怎么做一本PDF书了。
10.
You should plan to achieve a real mastery of a few Essential Skills ( PDF), which are spelled out in the attached document.
你应计划真正掌握一些附件（PDF）说明的基本技能。