Eg.22 Much the most important early symptom of tetanus is trismus, a painless spasm of the chewing muscles which causes difficultly in opening the mouth and in masticating.

 
  • 破伤风最重要的早期症状为牙关紧闭,即咀嚼肌无痛性痉挛,引起张口和咀嚼困难。
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