它建立了有向曲面上的曲面积分与它的边界曲线积分的关系。
It gives a relationship between a surface integral over an oriented surface and a line integral along a simple closed curve.
在简要回顾对曲线走势有重要影响的宏观经济政策之后，提出当前应当逐渐由扩张性财政政策向中性的财政政策转变。
We think that transition ought to start from expansionary fiscal policy to Neutral fiscal policy, after brief review to some macro-economic policy which had important influence on the curves.
这种曲线树是采用树的结构来描述曲线，其内部元素是有向相对高度。
Binary trees composed of directed relative height are adopted to describe curves.
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