ͲߵȌƌW(xu)УD(sh)^
u۞I(y)g(sh)W(xu)ԺD(sh)^
ͲߵȌƌW(xu)У
(lin)ϴW(xu)-(dng)2
(gu)Z(y)I(y)W(xu)ԺD(sh)^
(j)ϵ(rn)(j)ЌW(xu)