Songs with 60 to 80 beats per minute but no lyrics have been shown to reduce stress.

每分钟60到80拍纯音乐，轻压力。

Is it polyphonic with multiple lines, or is it a pure note with just a single line?

是多线复调，还是单线纯音？

Well, it seems songs no longer have an 'intro' – the instrumental piece of music that's played before the singing begins.

好吧，似乎歌曲不再有" 序曲" ——在歌声开始之前演纯音乐部分。

While some of us prefer complete silence, an uplifting piece of non-distracting music (without lyrics) may improve mood and increase the chances of information retention.

虽然我们有些同学更喜欢安静环境，一段振奋人心纯音乐（没有歌词）改善情绪，加深知忆。

Songs with 60 to 80 beats per minute but no lyrics have been shown to reduce stress even in patients who have undergone various types of surgeries.

每分钟60到80拍纯音乐轻压力，甚至在经历了各种手术病人身上也有同样效果。

Like R definitely changes the AW as in law vowel, it's not going to be a pure sound when R follows it in the same syllable.

就像 R 肯定会像法律元音一样改变 AW，当 R 在同一个音节中跟随它时，它不会是纯音。