The basic feature and principle of progressive addition lens (PAL) are introduced. Its soft design method based on Dirichlet principle was given.

介绍了渐变镜片的基本结构及工作原理，给出其基于狄利克雷条件的软设计方法。

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In addition to its support for progressive enhancement, jQuery allows you to leverage a large, vibrant community of plug-in developers.

除了支持渐进增强之外，jQuery还允许您利用大型的、活跃的插件开发人员社区。

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A: Because each topic has a title and short description in addition to its full content, applications can provide progressive disclosure.

答：因为每一主题除了正文以外都有一个标题和简短描述，应用程序可以提供渐进公开。

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Users now also have the option of creating stunning, high-quality 60p MP4 files (1920x1080 at up to 35Mbps) in addition to AVCHD Progressive (1920x1080 at up to 28Mbps) for added flexibility.

ENGADGET: Canon's latest VIXIA camcorders stream and share with your mobile device

There is certainly no shortage of stress relievers and in addition to the above, various progressive muscular relaxation exercises, autogenic training, deep breathing, massage therapies, visual imagery and self-hypnosis practices are popular.

FORBES: Study: Stress In America - 8 Cities Explored

In addition, the new camcorders offer Full HD MP4 (up to 35Mbps) and AVCHD Progressive (up to 28Mbps) 60p recording, so memories are captured in stunning image quality.

ENGADGET: Canon's latest VIXIA camcorders stream and share with your mobile device