ʝt(y)W(xu)ƌW(xu)УD^
W(xu)D^
(f)W(xu)D^
It(y)W(xu)ԺD^
RW(xu)Ժ У^(q)
RW(xu)ԺУ^(q)D
t(y)ƴW(xu)
t(y)W(xu)ԺγУ^(q)D