二重奏

When we get to duos it becomes hellishly complicated.

对二来说，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, 二成了三组。

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.

新的和冷静的罗技squeezebox二网络乐系统，预计可在美国和欧洲，由本月份为400美元。