Go back and give me the nocturne over again.

回去把夜曲给我重一遍。

Play me a nocturne, Dorian, and, as you play, tell me, in a low voice, how you have kept your youth.

给我弹一首夜曲，道连，边弹边小声告诉我你是如何保持青春的。

A " nocturne" (nocturne) is a piece of classical music that is usually written in something of, I guess we would call, a dreamy, perhaps slightly dark style.

“夜曲”（夜曲）是一段古典音乐，通常用某种东西写成，我想我们会称之为，梦幻般的，也许有点黑暗的风格。

I checked my step, hoping, and in a minute or two the musician began to play that nocturne of Chopin which I love best — I don't know how to name it.

我检查了我的脚步， 满怀希望，一两分钟后， 音乐家开始演奏我最喜欢的肖邦夜曲——我不知道如何命名。

The previous evening she had played a nocturne, and as I passed the open door of the drawing room, I'd watched for a moment as Mr. Gopnik sat down beside her on the stool.

前一天晚上她演奏了一首夜曲，当我经过客厅敞开的门时， 我看到戈普尼克先生在她身边的凳子上坐了下来。