n.密紋唱片(long-playing record)

abbr.低壓（=low pressure）

Porter's jazz LP has run its course on the record player to your left. 波特的爵士密紋唱片就在你左側(cè)的唱片播放器里播放。

If you've ever played an old LP record where the hole was not quite centered, you've heard the pitch rise and fall with each revolution. 要是你播放過老式慢轉(zhuǎn)密紋唱片，你就能聽到，當(dāng)唱片的空穴沒有置于唱機(jī)正中央，唱片每轉(zhuǎn)一周，音樂都會(huì)有音調(diào)高低的變化。