She gave a sharp twist to the accelerator and the handcar sped on again.

她猛地一扭油门， 手推车又开始加速了。

Grandma's body gave a sudden sharp twist and a sudden sharp jerk and she flipped herself clear out of the chair and landed neatly on her two feet on the carpet.

外婆的身体突然猛地一扭，猛地一跳，她从椅子上弹了起来，两只脚稳稳地落在地毯上。