超速档是指变速器中传动比小于1的档位(即i<1)，也就是说变速器的输出轴的转速大于输入轴的转速。
如果匆忙是加速器的踏板，一心多用就是超速档。
And if haste is the accelerator pedal, multitasking is overdrive.
当你把沃尔沃240打在超速档的时候，它有时候会不听话吗？
Did your 240 sometimes not go into overdrive when you pushed the overdrive button?
当中的大多数从超速档上购买书籍以及电子版权，它提供为图书馆专用的储存书籍的服务器。
Most of them buy books and their digital licenses from OverDrive, which stores books on its servers for libraries to use.
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