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英语翻译On graph paper,draw the axes,and the lines y = 12 and x

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英语翻译
On graph paper,draw the axes,and the lines y = 12 and x = 6.The rectangle
bounded by the axes and these two lines is a pool table with pockets in the four
corners.According to the laws of physics,if a ball travels along a line with slope m and strikes the side of the table,it bounces back along a line with slope –m.
在方格纸上(就是有无数小格子,用来画x轴y轴的那货),画出y轴是12和x轴是6的轴图,这两根轴和画出来的两根线形成了一个有四个袋纸的台球桌,根据物理定论,如果一个球沿着m(就是那个斜率)线滚动,直到碰到边沿为止,有此可得出,如果球滚回去,将会沿着-m线~