nu·ance /ˈnuˌɑn(t)s, ˈnju, ˌɑns; nʊˈ, njʊˈ/
  細微差別
  Nu·ance n.
  1. A shade of difference; a delicate gradation.
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  nuance
       n : a subtle difference in meaning or opinion or attitude;
           "without understanding the finer nuances you can't enjoy
           the humor"; "don't argue about shades of meaning" [syn: nicety,
            shade, subtlety, refinement]