Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. Ì
2. ‘Š
3. Šú
4. “Š

ƒŒƒxƒ‹3. •ύX
SDAL“‡‰pŒêŠwZ