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On this basis,the PDC bit's fivepoint survey theory is developed,and a series of formulas are derived,applying PDC bits' geometry and analytic space geometry.

在此基础上,运用PDC钻头几何学和空间解析几何学中的四点共面、行列式、坐标变换的知识,提出并导出了PDC钻头的五点测绘理论及系列公式。

The acid volcanic rocks of the Early Cretaceous Shangkuli Formation belong to continental crust anatexis type ones (S-type volcanic rocks) and may have formed by compression and migration of the Indian-Australia plate toward the NNE and delamination of the lower crust caused by the lithospheric extension in eastern China.

早白垩世上库力组酸性火山岩属陆壳重熔型火山岩,其形成可能与印度澳大利亚板块朝北偏东方向挤运移、中国东部岩石圈拉张引起的下地壳拆沉作用有关。

Can you help me to push my car, it is at anchor.

。劳驾帮我一下好吗?我的车抛锚了。

In the third section, there are six types of the method of geographical textual research, logic, reason, comparison, elimination, comprehensiveness and the method of giving evidence for ancientness in modern times.

第三部分总结张守节的地理考证方法,将其分为逻辑理法、事理证法、比较法、以今证古法、排除法和综合考证法等六种方法。

The seat tube and rear fork fold in the longitudinal plan of the bicycle. The wheels roll together until they are side by side by means of a structural feature shaped with a special angle at the bike's center. It can be folded as a Swiss knife.

具简单的结构,折迭方式是由车架的中心点拉起,并同时将车把手往下,座管和后叉可折迭于脚踏车的纵面,就像瑞士刀一样折收起来。

Deformation effects on particle emission in a fission process of ^251Es nucleus as functions of excitation energy, angular momentum, and viscosity coefficient have been investigated in detail within the framework of Smolu-chowski equation.

用处理转壳模型的粒子数守恒方法,分析了稀土变土变形核^172,174Hf的基态带和低激发高K多准粒子带的运动学转动惯量J^(1)随角频率ω的变化及基微观机制,特别是被拆散核子的Pauli堵塞交的重要影响。

From the homogeneity of time we can deduce mechanical energy conservation law, and from the homogeneity and isotrogy of space we can deduce monentum conservation law and angular momentum conservation law.

从时间的均匀性可得机械能守恒定律,从空间的均匀性和空间的各向同性可分别出动量守恒定律和角动量守恒定律。

C3 symmetry operation is regarded as a transformation operator in angular momentum representation and the crystalline potential in Oh symmetry can be simply derived.

将C3对称操作看作角动量表象的对称变换算符,导出Oh对称性晶场势。

This system not only can supply thesignals of the position and angular velocity, but also the dynamic measurement.

本课题对系统的主要电路进行了设计和调试,并导出了AD2S80A的传递函数,证明该系统是一个Ⅱ型系统。

Sea area measurement usually uses GPS timely processing the position data for the boundary of sea area,and then calculating the area of anomalistic area .

介绍几种求取平面不规则区域面积的方法,再演出专用于计算海域面积的坐标法和方格法,并给出一种适合计算机计算的数点法。

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推荐网络例句

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。