二重奏

When we get to duos it becomes hellishly complicated.

对二重来说，这就更是复杂得恐怖了。

The violinist walked on the stage and the duo became a trio.

那位小提琴家走上台, 二重变成了三重。

The new and cool Logitech Squeezebox Duet network music system is expected to be available in the US and Europe by this month for around $400.

的和冷静的罗技squeezebox二重网络乐系统，预计可在美国和欧洲，份为400美元左右。