距

After introducing the primary approximation approaches for curve and surface offset, we give an optimal approximation approach for offsetting curve based on shifting control points, which relies on approximating the normal by Legendre polynomial approximation.

在全面介绍了等距曲线曲面逼近的主要方法以后，作者首先利用Legendre多项式得到基曲线法矢曲线的最佳平方逼近，由此给出了基于控制顶点偏移的等距曲线最优逼近的算法，它在算法效果和效率上都远优于其他同类算法。

EF 100mm f/2.8 USM Macro, within the range, the EF 100mm f/2.8L Macro IS USM supports a full range of accessories including: Tripod Mount D, Macro Lite adaptor 67, Lens Hood ET-73 and EF12 II and EF25 II extension tubes.

英法100毫米f/2.8 USM微距宏，在范围内的外汇基金100毫米f/2.8L IS USM镜头支持微距，包括全系列的配件：三脚架接口开发，宏建兴适配器67，镜头遮光罩素- 73和EF12 II和EF25二延长管。

It is not reasonable that striking distances of lightning leader to phase conductor, ground line and the ground are equal in classical electric geometry method.

针对经典电气几何模型认为雷电先导对导线、避雷线、大地三者之间击距相等的不合理问题，提出了用击距系数来描述雷电先导对导线与大地击穿强度的差别；依据长间隙放电与雷击放电的相似性，开展了棒-板间隙实验以得到击中目的物概率为50%时雷电先导与地面、导线之间的位置关系。

Xingtang County, Hebei Province, China Sun Life lithopone plant is the provincial advanced enterprise, founded in 1980, after more than two decades of construction, China has become a medium-sized inorganic chemicals, I plant located in the industrial area south of County Bank, an area of Area of 52,000 square meters, construction area of 14,600 square meters, fixed assets 12,000,000 yuan, with an annual output of 10,000 tons lithopone, the existing staff of 269, of whom 58 were technical staff.

河北省行唐县永明立德粉厂是省级先进企业，始建于1980年，经过二十多年的建设，已成为我国无机化工中型企业，我厂位于行唐县城南工业区，占地面积52000平方米，建筑面积14600平方米，固定资产1200万元，年产立德粉10000吨，现有员工269人，其中技术人员58人。我厂距石家庄飞机场35公里；距京广铁路新乐站和京深高速公路新乐出口14公里；紧邻朔黄铁路、张石高速公路，交通十分便利。

The offset direction is defined by the local coordinate system, which is formed of the tangent vector and the normal vector of every point on the curve.

本文利用曲线上各点的切向量和法向量所形成的局部坐标系来确定等距方向，从而给出一种广义偏距曲线的新定义。

Last week, I regain the joyful of macrophotography. This week, I play again with remote flash.

Bee，蜜蜂上个星期重拾拍微距的"摄瘾"，这星期再来玩离闪微距。

Horizontal distance, difference in height and slope distance are calculated. Coordinate file data and manual input data are available to be used.

本程序可计算上述两种情况的平距、高差和斜距，计算可以使用坐标文件数据和手工输入数据。

Delta offset is an acceptance of maximum positive deviation from the offset value.

三角垂距是最大正面偏差取从垂距的值。

Installing a breathable plastic pot mendicancy at the different position of vessel base to improve the rhizosphere ventilation environment to study the effects of three of different rhizosphere ventilation environment on potted cucumber at the initial stage of growth (the distance to pot mendicancy is 2, 4 and 6 cm, and show them with IC1, IC2, IC3 respectively).

为改善容器栽培根际通气环境，在距容器底部不同位置安装一透气的塑料盆托，研究了3种不同根际通气环境（盆托距花盆底部2， 4， 6 cm，分别用IC1， IC2， IC3表示）对盆栽黄瓜生长初期及根际CO2含量的影响。

This implies that the atomic near neighbour distance of metallic bond solid solution is the closet to VCA model among the three solid solutions, although the vegard's law are not followed.

离子键固溶体中第一近邻距随成分的变化量只有近邻距Vegard定律变化量的40％左右，而共价键固溶体只有20％左右，金属键固溶体的变化量最大，一般都在50％以上，甚至高达80％左右。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。