v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path><o:lock v:ext="edit" aspectratio="t"></o:lock></font></font></v:shapetype></span></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font size="3">，定义</font></span><span lang="EN-US"><span style="position: relative; top: 3pt; mso-text-raise: -3.0pt">W</span><sup><span style="position: relative; top: 3pt; 