当出现前驱症状时，预示着病人可能在数小时或数日内出现大发作。
When prodromal symptoms, indicating that the patient may appear within hours or days as grand mal.
有些精神运动性发作，也可出现类似大发作的前驱症状。
Some psychomotor seizures, grand mal can be the precursor of similar symptoms.
前驱链球菌感染被察觉后，从链球菌感染到肾炎症状出现，大概还有一个一至三周的潜伏期。
When the preceding streptococcic infection is recognized, a latent period of roughly 1 to 3 weeks ensues between its onset and the appearance of symptoms of nephritis.
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