管弦乐队在演奏高潮部分时，鼓手用力敲击定音鼓。

The drummer struck the ___kettledrums powerfully during the orchestra's climactic section.

音乐会上，定音鼓的节奏为整首曲子增添了力量感。

The rhythm of the ___kettledrums added power to the whole piece during the concert.