hard-headed
 (a.)精明而實際的
 hard·head·ed, hard-head·ed, a. Having sound judgment; sagacious; shrewd; practical and pragmatic. -- Hard-head*ed*ness, n.
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 hardheaded
      adj 1: unreasonably rigid in the face of argument or entreaty or
             attack [syn: mulish]
      2: guided by practical experience and observation rather than
         theory; "a hardheaded appraisal of our position"; "a
         hard-nosed labor leader"; "completely practical in his
         approach to business"; "not ideology but pragmatic
         politics" [syn: hard-nosed, practical, pragmatic]