fit n.(癫痫等的)突发，发作;昏厥;痉挛;一阵(忍不住的咳嗽、笑);(强烈感情)发作，冲动

once a fit has started there is nothing you can do to stop it.

痉挛一旦发作就无法止住。

He had a fit or a seizure of some kind and then drowned.

他突然昏厥，要不就是某种疾病发作，接着就溺死了。

We brought you to Richmond because you have a history of fits, moods, blackouts, hearing voices.

我们带你来利奇蒙德是因为你有昏厥、喜怒无常、眩晕、幻听的病史。