He played a piece of music of his own composition.是什么意思？

He played a piece of music of his own composition.

他演奏了一首自己创作的曲子.

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。

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。

piece

n. 块，片，段，部分，部件，文章，音乐作品；vt. 修补，连接，接上；

例句
Mrs. Madrigal buttered another piece of toast...
马德里加尔夫人给另一片烤面包涂上了黄油。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

music

n. 音乐，乐曲，乐谱，乐队；

例句
Avant-garde music to this day has not found general public acceptance.
先锋音乐时至今日都没有得到大众的广泛认可。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

own

n. 自己的事物，自己人；vt. 拥有，承认；vi. 承认；adj. 自己的，特有的；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

composition

n. 作文，作曲，创作，构图，布置，妥协，和解；

例句
...the chemical composition of the ocean.
海洋的化学成分