Դʾ˾Ҫ̼ϵx늳늽Һ܄ӄȾWƷаl(f)aN˾ĺĮaƷ늽Һ܄ӄΞx늳늽ҺK˿ɑԴ܇IҪʳƷИI(y)t(y)ˎИI(y)ջИI(y)
(PI֣x늳 늽Һ)
|Ȼǰw
|̼R|RVR
V|VVVVϽ |
|G|GVG
С|NVNkV