The opening piece will be in sonata-allegro form.

开场的一支就是奏鸣曲式。

What's the meaning of the Mozart, the opening piece?

莫扎特的作品作为开幕曲有什么意义吗？

They were all very well, but did not produce upon me a tenth part of the impression that the opening piece did.

他们都很好， 但并没有给我留下开场曲的十分之一的印象。