按键发信者：轻声敲键盘的人要比吱吱作响者安静，但是这也不会让他们更讨人喜欢，因为他们在开会期间不停地操作自己的通讯设备。
The Tapper: Tappers are generally quieter than Crackers. But that doesn't make them any less annoying when they're tap-tap-tapping on their personal communication devices during meetings.
同样，人体的操作系统上运行安静，无形中在一切的背景下，我们这样做。
Likewise the body's operating system runs silently and invisibly in the background of everything we do.
EX型排风扇可适应所有需要通风的应用。它们是专为最高的效率和安静的操作而设计。
Type EX units are available in all sizes for all ventilating requirements. They are specially designed for maximum efficiency and quiet operation.
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