Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. —ñ
2. Šú
3. ‘Å
4. Õ

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ