“®ŽŒƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
open (transitive) =
1.
‚Ë‚é
2.
‚ ‚é‚
3.
‚ ‚¯‚é
4.
‚Ì‚Ú‚é
ƒŒƒxƒ‹4.
•ÏX
SDAL“‡‰pŒêŠwZ