first-class /ˈfɝs(t)ˈklæs/
 (a.)頭等的,第一流的
 first-class a. Of the best class; of the highest rank; in the first division; of the best quality; first-rate; as, a first-class telescope.
 First-class car or First-class railway carriage, any passenger car of the highest regular class, and intended for passengers who pay the highest regular rate; -- distinguished from a second-class car.
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 first-class
      adj : of the highest quality; "made an excellent speech"; "the
            school has excellent teachers"; "a first-class mind"
            [syn: excellent, fantabulous]
      adv : by first-class conveyance; with first-class accommodations;
            "we always travel first class"