当他看到蛇时，吓得往后退了一步。

He ___recoiled in fear when he saw the snake.

她对暴力内容感到极度反感。

She ___recoiled at the violent content.

这把猎枪的后坐力很大，每次射击后我的肩膀都会疼。

The ___recoil from this hunting rifle is so strong that it hurts my shoulder after every shot.