(adj.) difficult to accomplish; demanding considerable mental effort and skill; 'the arduous work of preparing a dictionary' .
(adj.) characterized by effort to the point of exhaustion; especially physical effort; 'worked their arduous way up the mining valley'; 'a grueling campaign'; 'hard labor'; 'heavy work'; 'heavy going'; 'spent many laborious hours on the project'; 'set a punishing pace' .
(adj.) taxing to the utmost; testing powers of endurance; 'his final, straining burst of speed'; 'a strenuous task'; 'your willingness after these six arduous days to remain here'- F.D.Roosevelt .
校对:玛吉
欧文整理