Mozilla Labs has announced an update to its Jetpack extensions system that makes it easier for developers to write browser add-ons that more closely interact with a person's computer desktop.

Mozilla实验室宣布对其jetpack扩展系统进行升级，新的系统使开发者更容易开发浏览器附加组件，并且更方便的与用户桌面进行交互。

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One of his group's first experiments is the prototype of Netra, a system that can identify problems with a person's eyesight using only a smartphone, software, and inexpensive optical add-ons.

研究小组最初的实验之一是Netra原型机，这是一种只需一部智能手机、相关软件和便宜的光学套件就可以鉴定视力问题的系统。

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And third is a programming tool to help bring to fruition a new system for Firefox add-ons.

第三是一种编程工具系统，帮助开发者更好的创建Firefox插件。

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The two higher-priced models feature nice add-ons like a USB port and Fiat's hands-free communications and entertainment system.

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It is still unclear how much the system will cost, although Microsoft says Natal add-ons will work with its existing Xbox 360 gaming console.

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In the housing market, Hovnanian Enterprises has created an IT-based system that makes it easier for home buyers to select new options and add-ons they would not otherwise have known about.

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