Surprisingly the curtain started to rise while the houselights were still undimmed .

意外的是，观众席灯光还没有完全熄灭时，幕布已经开始升起了。

Undimmed headlights ; surprisingly the curtain started to rise while the houselights were still undimmed .

明亮的前灯；幕布奇怪的开始升了起来，但是观众席上的灯光却没有暗下去。