• 1. premonitory symptoms: 地震征兆 | 前驱症状 | 出现前驱症状
• 2. premonitory symptoms of an earthquake: 地震的前兆
• 3. premonitory symptoms of apoplexy: 中风先兆

• 1.Since it is a rare disorder, it is difficult to say what the premonitory symptoms 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。
  dict.yoduao.com
• 2.Generally speaking, the incubation period or the premonitory symptoms 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。
  dict.yoduao.com
• 3.Of the 497 cases with apoplexy, there were 11 kinds of premonitory symptoms, of which headache, dizziness, numbness of the limbs, inarticulate speech, blurred version, etc. are more common.
  本文分析了497例中风患者的先兆症状。共出现11种先兆症状，其中以头痛、头晕、肢体麻木，言语不清及视物不清等症状为多。
  dict.yoduao.com

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