十五歲時蕭邦首次出版作品，並積極從事演奏活動。

十五歲時蕭邦首次出版作品，並積極從事演奏活動。

結果 (英文) 1:

At the age of fifteen, Chopard published works for the first time and was actively engaged in performance activities.

結果 (英文) 2:

At the age of fifteen, Chopin first published his work and was active in playing.

結果 (英文) 3:

At the age of 15, Chopin published his works for the first time and actively engaged in performance activities.