Œ`—eŽŒƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
difficult, hard =
1.
—Á‚µ‚¢
‚·‚¸‚µ‚¢
2.
d‚¢
‚¨‚à‚¢
3.
d‚¢
‚¨‚à‚¢
4.
“‚¢
‚Þ‚¸‚©‚µ‚¢
ƒŒƒxƒ‹4.
•ÏX
SDAL“‡‰pŒêŠwZ