I don't see it that way at all. I think it's a sine curve, like most of our lives.

我并不这样认为，我认为那是一个正弦曲线，就像大部分人的人生一样，有起有伏。

The last command used, reset, is strictly not necessary for plotting the sine curve.

使用的最后一个命令 reset 对于绘制正弦曲线不是必要的。

Let's now examine the simplest wave from where the profile is a sine or cosine curve.

现在让我们来考察最简单的波形，它的剖面图是正弦或余弦曲线。

Let's now examine the simplest wave form where the profile is a sine or cosine curve.

现在让我们来考察最简单的波形，它的剖面图是正弦或余弦曲线。

Type in plot sin (x) at the prompt: you should see the familiar sine curve in a pop-up window.

在提示符中输入plot sin (x)：您应该在弹出窗口中看到熟悉的正弦曲线。