The light went out, and the room was plunged into darkness.

灯灭了，房间陷入了黑暗之中。

《柯林斯英汉双解大词典》

There was a flash of lightning and the house was plunged into darkness.

雷电闪过，房子陷入一片黑暗之中。

《牛津词典》

The stage was plunged into darkness.

然后舞台陷入了黑暗。

youdao

After the 100th candle, the room was plunged into darkness and something spooky was supposed to happen.

ECONOMIST: There is more than you think to the haunting of Japan

Many parts of Delhi were also plunged into darkness because of a breakdown in the power transmission grid.

BBC: India cold snap kills hundreds

He left behind him an immense city plunged into darkness, where the only lights were the reflections of his headlamps.

NEWYORKER: The Autobiography of J.G.B.