來自小時(shí)候的記憶：電視播放不流暢了，用手拍拍電視機(jī)；收音機(jī)接收信號不佳，就把收音機(jī)挪個(gè)地方或者敲打兩下；手表走得不準(zhǔn)了，就拿起來晃一晃。我們生活中的這些設(shè)備，在很多時(shí)候是不需要專門的技術(shù)來維護(hù)的，時(shí)不時(shí)敲打幾下就能正常運(yùn)轉(zhuǎn)。這就是我們今天說的“敲打式維護(hù)”。

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.
“敲打式維護(hù)”指設(shè)備有故障的時(shí)候，不找專門的維護(hù)人員，而是用敲打的方式讓其恢復(fù)運(yùn)轉(zhuǎn)。

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.
電視或電腦等電子設(shè)備出故障的時(shí)候，你有時(shí)會通過敲打的方式讓其恢復(fù)運(yùn)轉(zhuǎn)。而且這種方式通常都會管用。

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.
昨天我的電腦鍵盤壞了，連一個(gè)字母都打不出來。我給敲打了一下，然后就跟新買的一樣好用了。

（中國日報(bào)網(wǎng)英語點(diǎn)津 Helen）