mar·gin·al /ˈmɑrʤnəl, ˈmɑrʤənḷ/
  (a.)邊緣的,末端的,有旁注的
  mar·gin·al /ˈmɑrʤnəl, ənḷ/ 形容詞
  邊緣的,緣的,緣盾(龜)
  marginal
  邊緣的;臨界的;邊際的
  marginal
  邊際
  Mar·gin·al a.
  1. Of or pertaining to a margin.
  2. Written or printed in the margin; as, a marginal note or gloss.
  ◄ ►
  marginal
       adj 1: at or constituting a border or edge; "the marginal strip of
              beach" [syn: fringy]
       2: of questionable or minimal quality; "borderline grades";
          "marginal writing ability" [syn: borderline]
       3: of a bare living gained by great labor; "the sharecropper's
          hardscrabble life"; "a marginal existence" [syn: hardscrabble]
       4: just barely adequate or within a lower limit; "a bare
          majority"; "a marginal victory" [syn: bare(a)]
       5: producing at a rate that barely covers production costs;
          "marginal industries"; "marginal land"
       6: of something or someone close to a lower limit or lower
          class; "marginal abilities"