ƚ  0T 3 .   &  & MathType-@F| Times New Roman؟ww w f-2 TCy2 nrBy2 Cy2 nAy2 Cy2 nBy2 nxAySymbolP ؟ww w f-2 `+y2 `L=y2 n+y & "Systemβ f !-