F(xin)ڵλã(y) > аl(f) > Ԕ(x)(ni)
һ(y): @R
һ(y): Ʒzy(c)
I(yng)a(chn)ƷУÓˮ؇UҺwUˮٟtpw併؇C(j)ÓSƷr(ji)(bo)r(ji)