Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. ŠÙ
2. ‰@
3. Šú
4. –ò

ƒŒƒxƒ‹3. •ÏX
SDAL“‡‰pŒêŠwZ