arduous
英 ['ɑːdjʊəs]
美['ɑrdʒuəs]
	    - adj. 努力的;费力的;险峻的
 
英英释意
- 1. characterized by toilsome 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"
 
- 2. 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
 
- 3. difficult to accomplish; demanding considerable mental effort and skill;
 - "the arduous work of preparing a dictionary"