Headaches, backache and other pains, light-headedness, jerks and tremors all occur in totally healthy persons.
像头痛、背痛和其他疼痛、头晕、肌肉抽搐、痉挛性震颤等，都是完全健康者也可能发生的。
Present in some prescription glasses, it has the effect of bending light and can cause double vision or headaches in some wearers.
研究者发现，这些廉价墨镜在透光性上做得十分低劣，因光线透过劣质镜片而光线发生折射，容易造成视觉重影、甚至还有头疼眩晕的迹象。
The most common symptoms are a stiff neck, high fever, sensitivity to light, confusion, headaches and vomiting.
最常见的症状是颈部僵硬、高烧、对光敏感、精神错乱、头痛和呕吐。
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