她背部感到一阵剧痛。

She experienced ___a ___sharp ___pain in her back.

跌倒后，她只记得手臂上一阵剧痛，然后就什么都不知道了。

After the fall, all she could recall was ___a ___sharp ___pain in her arm and then nothing.

胸部突然袭来一阵剧痛，让他喘不过气来。

The sudden onset of ___a ___sharp ___pain in his chest made him gasp for breath.