Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1.
’š
2.
Œ¤
3.
Šú
4.
‰w
ƒŒƒxƒ‹3.
•ÏX
SDAL“‡‰pŒêŠwZ