Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. ŒÎ
2. ŠK
3. Šú
4. ‘S

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ