内因...

endopathic的音标：endopathic的英式发音音标为：['endəpæθɪk]endopathic的美式发音音标为：['endəpæθɪk]...

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....