Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1.
•b
2.
‹â
3.
’š
4.
Šú
ƒŒƒxƒ‹3.
•ÏX
SDAL“‡‰pŒêŠwZ