so·ste·nu·to /ˌsostəˈnu(ˌ)to, ˌsɔs-/
  (a.)[把音] 延長的;持續的
  Sos·te·nu·to a.  Mus. Sustained; -- applied to a movement or passage the sounds of which are to sustained to the utmost of the nominal value of the time; also, to a passage the tones of which are to be somewhat prolonged or protacted.
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