Œ`—eŽŒƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
convenient =
1.
—Ç‚¢
‚¢‚¢i‚æ‚¢j
2.
‰ºŽè
‚Ö‚½
3.
V‚µ‚¢
‚ ‚½‚炵‚¢
4.
•Ö—˜
‚ׂñ‚è
ƒŒƒxƒ‹4.
•ÏX
SDAL“‡‰pŒêŠwZ