存储当前类型的所有曲线。
由6个功能模块组成,即重画坐标系功能、清除当前曲线功能、清除所有曲线功能、绘制新曲线功能、输入参数功能、退出窗口功能。
It is made up of such six modules as an re-drawing coordinate system, cancelling the current curve, cancelling all the curve, drawing new curve, input parameters, exit window.
我并不是说所有的环境问题都会符合这些曲线,或者环境的改善会自动地发生。
I'm not trying to argue that all environmental problems fit these curves, or that these improvements happen automatically.
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