这位年轻的舞者首次担任半独舞演员，为主舞者提供了完美的衬托。

The young dancer performed as a ___demi-soloist for the first time, providing perfect support to the principal performer.

她在芭蕾舞团中担任半独舞演员，有时会有自己的独舞片段。

She serves as a ___demi-soloist in the ballet company, occasionally performing short solo pieces.