Sing those bars an octave lower.

【low】那几个小节用低八度唱。

I'll be learning from my singer, and then I'll record myself singing, and I'll realize that I've sung a couple of notes a little bit different—a little bit higher here, a little bit lower there.

我会向歌手学歌，之后录下自己唱的，我会意识到有几个音符更原版不一样——不是稍微高一点，就是稍微低一点。