He could manage the hectic work and supply shortage, but scene after scene of the tragedy of poverty, illiteracy, disease and warfare played on in the "Dark Continent," tiring him mentally and physically.
工作的繁重和物質的匱乏可以勉強忍受，但黑暗大陸一幕又一幕因貧困、無知、疫病與人為戰禍而不斷上演的慘劇，卻令他身心俱疲。