| 1. | The radius vector of each solid is always a positive length .
每个立体的矢径总是正值长度。
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| 2. | Second, since the radius vectors r to the extreme points of the ellipse satisfy(5. 3-12)they are parallel to the two allowed d vectors .
其次，因为到椭圆极值点的径向矢量r满足式（53-12），故这两个径向矢量与两个允许的D矢量平行。
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| 3. | Second , since the radius vectors r to the extreme points of the ellipse satisfy ( 5 . 3 - 12 ) they are parallel to the two allowed d vectors
其次，因为到椭圆极值点的径向矢量r满足式（ 5 3 - 12 ） ，故这两个径向矢量与两个允许的d矢量平行。
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| 4. | The angular extent in a specified plane which contains all the radius vectors of the polar curve of luminous intensity having lengths greater than a specified fraction of the maximum
在某一平面上，一定角宽范围内所包含的光强极轴曲线上的矢径长度均大于其最大值的某一特定比例，这种情况定义为光束的发散。
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| 5. | According to the principle of odontoprisis ' force , the radius vector value of cam on the open - closed armature position was calculated by the means of one dimension searching method at the open - closed odontoprisis cam outline
该方法根据咬纸牙产生咬纸力的原因，计算实际开闭牙位置在凸轮上对应的向径值，利用计算机一维搜索方法得到开闭牙的实际位置。
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| 6. | Based on the three new supposition and the tow new mechanical tools : moment vector and radius vector , the warping theory introduced the analytical method of the rotation of a cross section around a fixed axis , so as to make the space stability of the thin - walled member complanate and one - dimensioned
翘曲理论以三条新的假定和新建立的弯矩矢量和转角向径两大力学工具为基础，提出了绕定轴转动的分析方法，使薄壁构件的空间变形平面化、一维化。
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