Since it is a rare disorder, it is difficult to say what the premonitorysymptoms are.
由于这是一种罕见的病症，我们很难说清楚它的初期症状。
2
Generally speaking, the incubation period or the premonitorysymptoms duration is shorter, the symptom is more serious, the mortality rate is higher.
一般来说，潜伏期或前驱症状持续时间越短，症状越严重，死亡率越高。
3
Of the 497 cases with apoplexy, there were 11 kinds of premonitorysymptoms, of which headache, dizziness, numbness of the limbs, inarticulate speech, blurred version, etc. are more common.