Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. —R
2. Šú
3. K
4. —·

ƒŒƒxƒ‹3. •ύX
SDAL“‡‰pŒêŠwZ