Somewhere it played ; he could hear it, an old accordion.是什么意思？

Somewhere it played ; he could hear it, an old accordion.

他能听见在某个地方有手风琴正在奏这支舞曲.

somewhere

adv. 某处，在某处，在[到]某处，不知道在[到]什么地方，某地；

例句
I'm going to live off campus if I can find somewhere cheap enough...
要是能找到足够便宜的地方，我就不在校园里住了。

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

played

v. 演奏( play的过去式和过去分词 )，演出，参加比赛，捉弄；

例句
The band played the Czech anthem.
乐队演奏了捷克国歌。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

hear

vt.& vi. 听到，听见；vt. 听说，得知，听取，审理；vi. 听，听见；

例句
When I listen to her play I can hear a new Nigel Kennedy.
从她的演奏中我听出了新一代的奈杰尔·肯尼迪。

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

例句
He started eating an apple...
他开始吃苹果。

old

adj. 老的，古老的，以前的，（用于指称被替代的东西）原来的；n. 古时；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。

accordion

n. 手风琴；adj. 可折叠的；

例句
Where some people learned to play the accordion for dances in their community, others took music lessons...
一些人学习弹手风琴，为他们社区里的舞蹈表演进行伴奏，而其他人则上音乐课。