la·bo·ri·ous /ləˈboriəs, ˈbɔr-/
 (a.)艱苦的,費勁的,勤勞的
 La·bo·ri·ous a.
 1. Requiring labor, perseverance, or sacrifices; toilsome; tiresome.
 Dost thou love watchings, abstinence, or toil,
 Laborious virtues all?  Learn these from Cato.   --Addison.
 2. Devoted to labor; diligent; industrious; as, a laborious mechanic.
 -- La*bo*ri*ous*ly, adv. -- La*bo*ri*ous*ness, n.
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 laborious
      adj : 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"
            [syn: arduous, backbreaking, grueling, gruelling,
             hard, heavy, punishing, toilsome]