短語詞組短語scalar r quantity 標量Scalar Quantity implicatures 等級數(shù)量含義scalar quantity field 標量場scalar quantity waves 標量波twin scalar quantity waves 孿生標量波conservation scalar quantity method 守恒標量法operations of scalar quantity 標度運算scalar quantity iconicity 等級數(shù)量象似性real scalar quantity 實際量 返回 scalar quantity