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。
SIGSYS - Parameter not valid to subroutine.
SIGSYS—参数对于子例程无效。
Once the keyword and display parameter hash has been built, we can move on to our simple keyword matching subroutine: matchWords.
构建了关键字和显示参数散列之后，接下来我们可以查看简单的关键字匹配子程序：matchWords。
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