On the iPhone, these ICONS are clickable links that make it easy to place a call or compose an email from the view without having to open the entry.

在iPhone中，这些图标都是可单击的链接，可以很轻松地从视图中拨打电话或编写电子邮件，而不需要具体打开联系人条目。

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This is perhaps the most important point to make about open-source software: it lowers the barriers to entry into the software market.

这也许是最重要的一点要对开源软件：它降低了对进入软件市场进入壁垒。

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