Take some time to explore the demos above and look at the extension source code to get an appreciation for how complex an ext JS extension or plug-in can be.

花一点时间来研究以上演示、看看扩展源代码，获取对扩展和插件的复杂程度的一个正确了解。

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Take a look at the Resources section for a link to the Ext JS site, which provides information on rates for commercial licenses.

参考资料中提供了Ext JS站点的链接，这个站点提供关于商用许可证的详细信息。

youdao

At first it can be difficult to appreciate the difference between an extension and a plug-in in ext JS, particularly given their similarities in terms of what they do.

首先，在Ext JS中很难分辨扩展和插件之间的不同，尤其是考虑到它们在使用时的相似性。

youdao

Ryan Dahl, creator of Node.js, works at cloud software company Joyent.

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At least three of the Js will compete in a regatta June 15-19 in Newport, R.

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Most of the yachts at the Classic have racing pedigrees as illustrious as the two Js'.

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