Desmos可以这样画： 然后移动起点 (红点)和终点 (蓝点)把显示的数字a,b,c,d代入算出每一条参数方程即可 如果你想用平滑曲线画，那可以用 贝塞尔曲线 这个前期就费点功夫，你要把你选取的那阶贝塞尔.
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President Trump speech after US strikes on Iran Read the transcript
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