He let his head loll and jerk up as if out of sleep.他耷拉着脑袋, 然后突然惊醒般抬起头来。

His head jerked up and he stared at me.他猛然抬起头来并盯着我看。

He had been looking down at the body; he jerked his head up as Malone spoke to him.他一直低头看着尸体, 当马隆跟他说话时突然抬起头来。

I jerked up the collar of my jacket.我猛地把我的夹克衣领竖了起来。