Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. ˆõ
2. Šú
3. —r
4. •Ô

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ