va·can·cy /ˈvekən(t)si/
 空,空白,空缺,空虛,空閒,茫然所失
 Va·can·cy n.; pl. Vacancies
 1. The quality or state of being vacant; emptiness; hence, freedom from employment; intermission; leisure; idleness; listlessness.
    All dispositions to idleness or vacancy, even before they are habits, are dangerous.   --Sir H. Wotton.
 2. That which is vacant. Specifically: --
 (a) Empty space; vacuity; vacuum.
 How is't with you,
 That you do bend your eye on vacancy?   --Shak.
 (b) An open or unoccupied space between bodies or things; an interruption of continuity; chasm; gap; as, a vacancy between buildings; a vacancy between sentences or thoughts.
 (c) Unemployed time; interval of leisure; time of intermission; vacation.
    Time lost partly in too oft idle vacancies given both to schools and universities.   --Milton.
    No interim, not a minute's vacancy.   --Shak.
    Those little vacancies from toil are sweet.   --Dryden.
 (d) A place or post unfilled; an unoccupied office; as, a vacancy in the senate, in a school, etc.
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 vacancy
      n 1: being unoccupied
      2: an empty area or space; "the huge desert voids"; "the
         emptiness of outer space"; "without their support he'll be
         ruling in a vacuum" [syn: void, emptiness, vacuum]