by some fell chance.

• 可怕的机会

by some fell chance.的用法和样例：

例句

1. I was awakened by a frightful clap of thunder.
   我被一声可怕的雷声惊醒。
2. He fell on the floor with an awful whomp.
   他摔在地板上发出一声可怕的撞击声。