Œ`—eŽŒƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
difficult, hard =
1.
ä•v
‚¶‚傤‚Ô
2.
“‚¢
‚Þ‚¸‚©‚µ‚¢
3.
‚‚¢
‚½‚©‚¢
4.
’É‚¢
‚¢‚½‚¢
ƒŒƒxƒ‹4.
•ÏX
SDAL“‡‰pŒêŠwZ