她突然感到背部一阵剧痛。

She suddenly felt ___a ___sharp ___pain in her back.

摔倒后，他听到一声巨响，手臂一阵剧痛，然后失去了意识。

After the fall, he experienced a loud crash, ___a ___sharp ___pain in his arm, and then lost consciousness.

患者描述说一阵剧痛间歇性地穿透他的胸部。

The patient described ___a ___sharp ___pain that shot through his chest intermittently.