半音音阶 meaning in English

chromatic scale

But suddenly a storm came on , chromatic scales and chords with the diminishing sevenths could be heard in the orchestra , and they all ran off , dragging one of the performers again behind the scenes , and the curtain dropped . again a fearful uproar of applause arose among the spectators , and all began screaming with rapturous faces
但是忽然刮起了一阵暴风，管弦乐队中响起了半音音阶和降低的七度音和弦，大家都奔跑起来，又把在场的一人拖到了后台，幕落了，观众之间又出现了可怕的喧嚣声和噼啪声，大家的脸上都带着洋洋得意的神情，开始呼喊起来。