'It's harder to be a parent than a space shuttle commander', trailblazing Nasa pilot tells BBC
Some smoke alarms have been designed to be ultra-sensitive. Aspirating devices, for example, constantly suck in air in order to detect even small quantities of smoke in a room. They are often used in commercial settings, including server rooms packed with expensive computer tech.
'Defensive attitude'，详情可参考safew官方下载
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，这一点在快连下载安装中也有详细论述
paper: “notebook paper with subtle ruled lines”
alloca which can allocate on the stack. Microsoft's C compiler also supports alloca but calls it _alloca，更多细节参见爱思助手下载最新版本