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

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ