Rather than doing multiple checks for each type of input, one would make one call to the input sub-system and it would transparently check all devices.
Rather than doing multiple checks for each type of input, one would make one call to the input sub-system and it would transparently check all devices.
与其直接依次去检测每种输入设备，不如让我们来调用一次输入子系统，它会透明地去完成检测所有的输入设备的工作。