APPd

һ pd

̫ƽ܇W(wng) > L(fng)2 > L(fng)2M(fi)

L(fng)2M(fi)

Ʒƣ

܇ͣ L(fng)2

ٷr(ji) o(bo)r(ji)

܇ģDƬ

L(fng)2x}

ʾ

_

֮ܲ鿴܇ҵĺ܇тĻ؏(f)Ŷ

Ҫᆖ