...The day had been long and arduous, and he slept soundly andcomfortably, though he growled and barked and wrestled with bad dreams... 
Jack London 「The Call of the Wild」
... and devotes himself to the arduous calling of chivalry? Whatknight-errant ever paid poll-tax...
Miguel de Cervantes 「The History of Don Quixote, Vol. I, Complete」
... To Tarzan this was aless arduous labor than to Tantor, for Tarzan's stomach was smaller,and being omnivorous, food was less difficult to obtain...
Edgar Rice Burroughs 「Jungle Tales of Tarzan」
...Nor was the taskany sinecure since the captive kicked and struggled as best she might,making their labor as arduous as possible...
Edgar Rice Burroughs 「Tarzan the Terrible」
... Her crew were lazily enjoying this respitefrom the arduous labor of rowing up stream...
Edgar Rice Burroughs 「The Son of Tarzan」
..." Outside the village the march promised to be less arduous than between Imbiki and Msuwa...
Henry M. Stanley 「How I Found Livingstone」
...Without the guidance of such competentauxiliaries I could not have performed my arduous task...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Their movements are free and are directed by the sense of sight; but their surgery is confronted in another respect with a most arduous problem...
J. Henri Fabre 「More Hunting Wasps」
...The higherplace in society occupied by the choicest members of the white race, andthat too after long years of arduous preparation, had to be assumed byblack men without personal or formal fitness...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
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