out·door /ˈaʊtˌdor, ˌdɔr; ˈaʊtˈ/
  (a.)戶外的,屋外的,露天的
  Out·door a.  Being, or done, in the open air; being or done outside of certain buildings, as poorhouses, hospitals, etc.; as, outdoor exercise; outdoor relief; outdoor patients.
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  outdoor
       adj 1: located, suited for, or taking place in the open air;
              "outdoor clothes"; "badminton and other outdoor
              games"; "a beautiful outdoor setting for the wedding"
              [syn: outdoor(a), out-of-door, outside] [ant: indoor(a)]
       2: pertaining to or concerning the outdoors or outdoor
          activities; "outdoor education is the area of teacher
          training concerned with training for outdoor activities"