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