让我们来做第二部分，这是单位圆上的一段圆弧。
Let's do the second part, which is a portion of the unit circle.
早期的罗马人利用月亮的圆缺和位置作为向导来推测月份。
The early Romans used the moon as a guide to measure the months.
在按钮的控制下，通过鼠标拖动来画直线和圆，轻松自如。
Under the control of the button, through the mouse to draw a line and round, easily.
我们能够以资本货物的美圆总值来估计出全部资本货物。
We can approximate the universal capital good as the total dollar value of capital goods.
我和晨洲人十年来不是一直在圆那个梦吗？
Aren't Chenzhou people and I try to read the dream for ten years?
我和晨洲人十年来不是一直在圆那个梦吗？
Aren't Chenzhou people and I try to read the dream for ten years?
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