A mark used as a superscript to indicate the first derivative of a variable.
A mark used as a superscript to indicate the first derivative of a variable.
撇号置于右上角的符号，用以标明变量的第一个导数
A mark used as a superscript to indicate the first derivative of a variable.
撇号置于右上角的符号，用以标明变量的第一个导数