Barycentric Coordinates
Kevin Church/BBC News。关于这个话题，safew官方下载提供了深入分析
。关于这个话题，safew官方版本下载提供了深入分析
只不过，「搓擦条」的最终成品相当别扭，还要单独适配，导致开发者兴趣寥寥，用户能实际得益于触控的场景也非常有限。但如今，整块屏幕都可以触控，用户想怎么用就怎么用，反而从根本上解决了交互设计的问题——毕竟，谁不会用 iPhone 和 iPad 呢？，详情可参考一键获取谷歌浏览器下载
Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
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