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Man's preoccupation with time derives ultimately from hisunique relationship to it.

人们对时间的关注来源于他们与时间的特殊关系。

Pulpwood usually derives from four types of woody materials in a mixed logging operation.

纸浆用木材通常来源于混合林的伐木作业中的四种木质原材料。

By means of two different methods, the author derives a general equation for expanding the product of two Jacobis triple products, which can be considered as the common generalization of the quintuple, sextuple and septuple product identities.

利用两种不同的方法，作者建立一个关于两个Jacobi三重积之乘积展开的广义公式，它可以看作是五重积，六重积和七重积恒等式的统一形式。

Based on up_ and down_going wave decomposition and elastic wave power reciprocity theorem, this paper derives, in the lateral velocity varying case, linear prediction operators expression and the generalized spectral factorization equation for reflection dataset.

本文基于上下行波分解及弹性波互易定理，导出横向变速介质条件下线性预测算子的表达式和反射数据的广义谱分解方程。

This dispute derives from some necessary questions existed, such as the understanding of trademark registrability, the prior right, the similarity to others and judging standards.

在中国与韩国两个国家，商标均实行注册保护制度，而注册则相当于对商标权人之商标权取得的确认。

For solving regular polygon,the author presents a geometrograph which divides the circumference uniformly and arbitrarily; and derives an analytic expression.

介绍任意等分圆周的几何作图法及所推导的解析表达式，提出用解三角形法解决正多边形零件在设计和加工中的计算问题。

The company derives 10 percent of its revenue from that part of the world.

公司10%的收益来自该地区。

This paper derives from the research and development of control system of intelligent road roller in "863" project.

本文来源于"863"重大专项"基于转运车的机群智能化工程机械及信息化制造"(2003AA430020)中智能压路机控制系统研究开发。

The algorithm utilizes the rotating transformation theory of vector, and derives a mathematical expression of trigonometric function which has the interval monotonicity. By comparing the values of mathematical expressions, the sizes of the angles can be judged, this avoids the troublesome calculations of angles, diminishes errors and raises efficiency.The prototype of 3D reconstruction system uses the DXF file as the data source.

文中的算法采用矢量的旋转变换理论，通过计算各分支路径与当前路径之间的三角函数值，利用变换后的三角函数表达式的区间单调性，将角度值的比较转换为三角函数表达式值的比较，从而避免了繁琐的角度值计算，减少了误差，提高了执行效率。

According to the rotational motion with space-variant blur and different motion rates for image,this paper analyzes how the rotational motion is generated and derives a mathematical model of rotational motion.

对旋转运动模糊这种具有异速像移的空间变化模糊进行了分析，并推导出旋转运动模糊的数学模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。