ΰl(f)m܇
a(chn)ƷB
mڸٹ·h(hun)ǵ·ɵC(j)a^ȈęC(j)е߱I(y)emȱˮ^(q)Լ҇^(q)߱I(y)
÷քƥĆΰl(f)I(y)әC(j)(gu)C(j)еӽY(ji)(gu)ΣʂfЧʸ
ȡbl(f)әC(j)܇βŷ^ͬpl(f)әC(j)܇ͿɴȽ
I(y)^pl(f)m܇ɽ5dB
\M^ͬpl(f)әC(j)܇Ϳɹ(ji)ʡ30ϣ
So(h)B(yng)M^ͬpl(f)әC(j)܇Ϳɽ30ϣ
D(zhun)QC(j)(gu)O(sh)ӋF(xin)ȫI(y)
I(y)ٿcױPڞһwO߲ˆTmԡ
g(sh)(sh)