һľʺİY
Իľl(f)ʺr۲λܓp~ʧˮήή仨 ľʺA(y)
ʩ(j)ľķNͲͬڌʷݵIJͬҪmrmʩʣѭ"ʩ"ԭt軨ʩʝȲ^ һ0.1%ҞˣaƵҺϡ5-10ʩмɌҺʵ뻨ˮ ʩʡԻľʩʕrľϵcֱӽ|ҪڷϼһȻl(f)ʺľʺēȷ
1.ˮ ⣺l(f)F(xin)Իľl(f)ʺ(yng)r cˮMеķȣֲʧˮëˮ(yng)ܺ ֲmaժ~Ƭpv~懊ˮ
2.ϴQ裺ľܰl(f)ʺұ^ؕrôˮϴϵȻQQժ~Ƭꎛĵ ڸϵˮδ֏(f)֮ǰ(yng)rM~懊ˮ
һƪ ɽ軨~Ƭl(f)Sӷֹ