Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. Šú
2. –û
3. ”g
4. –ð

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ