The initialize_vertices function needs to be called in the main program, so add the function call in the main subroutine at line 597.

需要在主程序中调用initialize_vertices函数，因此把函数调用添加到位于第597行的main子程序中。

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Line search - a technique for one dimensional optimization, usually used as a subroutine for other, more general techniques.

线搜索-技术，一维的优化，通常用作其他子程序，更普遍的技术。

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After the subroutine parameter is given the origin number, the plotter controlled by computer can draw out automatically extension line, dimension line, arrowhead and write dimension figures.

当给子程序的参数赋以初值后，由计算机控制自动绘图机绘制出尺寸界线、尺寸线、箭头和注写尺寸数字。

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