来自小时候的记忆：电视播放不流畅了，用手拍拍电视机；收音机接收信号不佳，就把收音机挪个地方或者敲打两下；手表走得不准了，就拿起来晃一晃。我们生活中的这些设备，在很多时候是不需要专门的技术来维护的，时不时敲打几下就能正常运转。这就是我们今天说的“敲打式维护”。
Percussive maintenance refers the use of physical concussion, a knock or a tap, in an attempt to make a malfunctioning device work instead of asking for professional help.
“敲打式维护”指设备有故障的时候，不找专门的维护人员，而是用敲打的方式让其恢复运转。
Percussive maintenance happens when your piece of electronic device — television, computer, etc — won't work, you give it a sharp unscientific whack to revive it. And it often works.
电视或电脑等电子设备出故障的时候，你有时会通过敲打的方式让其恢复运转。而且这种方式通常都会管用。
For example:
My computer keyboard didn't work yesterday, I couldn't type even a single letter. After a percussive maintenance, it worked like a newly-bought.
昨天我的电脑键盘坏了，连一个字母都打不出来。我给敲打了一下，然后就跟新买的一样好用了。