The doctor warned me not to overstrain my eyes in writing the report.
医生警告我不要为写报告而过度使用眼睛.
Both endopathic factors and exopathic factors might cause fatigue, but overstrain was the main etiology.
内因、外因均可导致疲劳, 但以内伤尤其过劳为主要病因.
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