  66 Ҫƽ˼Ĳƽ
  1 Ҫƽ˼ĲƽҪȫ֮Ĺٲк񣬲ݳΪҪڵҵıŲϣʹжǰҵ֮УҵķŭҪ̤ƽȫ˭ҲŹеĳжɥҪȫػΪ棬ʹжڷ֮УӴ˲ٰܻࡣ
  2 ҵļƻѶ˭ҲҪĶҴҡȫ֮ζ֮ʱе˾ֻȻһˣָˣҲˣҲˣıǻϲ˶ΪңȫһƬڡй֮Ҫɾ͵Ĺе֮䣬ڼƻеĹ˶ڡѡŸ
  3 ֮˶עĿԼĹޣΪӵȷˣʹڴˣٵʱգﶼ֮Ȼˡ˭ܽҵӳأѵڵ֮ѵ֮ʹ𣿵ҷʼɫ֮ʱҵڱȫ࣬˶ɫи֮գҵ֮գҲ±仯֮ա
  һ ȫ˵ڶʮƪ
