Render Options in Rails 3 - Yehuda Katz looks at how Rails 3's rendering pipeline works and demonstrates how to add a custom PDF renderer to it.

—— Yehuda Katz关于Rails 3的渲染通道工作，并演示了如何添加自定义的PDF格式渲染器（render）。

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I did come across a document (PDF) from the U. s. Consumer Product Safety Commission that suggests that ages four and five are when it's appropriate for kids to "ride small bicycles."

我怡好从美国消费品安全委员会里看到一份文件(PDF格式的)，上面告诉我们，四岁五岁是孩子“骑儿童自行车”的适当年龄。

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According to this handy little booklet (PDF) from the U. S. Department of energy, 11 percent of a household's energy budget is spent on lighting.

根据这本美国能源部的方便小册子(PDF)，家庭能源预算的11%花在了照明上。

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Federal form 1040-SS, U.S. Self-Employment Tax Return (downloads as a pdf).

FORBES: A Beginner's Guide To Taxes: Which Tax Form Should I File?

Today, I am proud to release the U.S. Government six-year strategy to combat malaria (pdf) globally.

WHITEHOUSE: Our Top Stories

In Safari, for example, you can Tweet a link to a Web page, send it via Messages or e-mail it as a link, a PDF attachment or inside the message's body.

CNN: Review: Mac's Lion adventure continues