up·stairs /ˌʌpˈstærz, ˈstɛrz/
  (a.)樓上的(ad.)在樓上,向樓上,處于更高地位樓上
  Up·stairs adv. Up the stairs; in or toward an upper story.
  Up·stairs a. Being above stairs; as, an upstairs room.
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  upstairs
       adj : on or of upper floors of a building; "the upstairs maid";
             "an upstairs room" [syn: upstair] [ant: downstairs]
       adv 1: on a floor above; "they lived upstairs" [syn: up the stairs,
               on a higher floor] [ant: downstairs]
       2: with respect to the mind; "she's a bit weak upstairs" [syn:
          in the head, in the mind]