她的腿突然抽筋，疼得站不起来。

She couldn't stand up due to painful ___spasms in her leg.

他的肌肉在剧烈运动后出现了间歇性痉挛。

His muscles experienced ___spasms after the intense workout.

他的演讲充满了激情，时不时迸发出强烈的情绪。

His speech was full of passion, with occasional ___spasms of intense emotion.