[数学] variable; variable quantity; alternating quantity◇变量范围 range of variables; variable range; 变量函数 variable function; 变量系数 variation coefficientfortran变量: fortran variableλ变量: lambda variable半变量: hemi-variate变量泵: adjustable discharge pump; controllable capacity pump; pumof variable delivery type; variable capacity pump; variable delivery pump; variable displacement pump; variable output pump; variable pump; variable stroke pump; variable volume pump; variablepump变量比: transformer ratio下载手机词典可随时随地查词查翻译