principal surface是什么意思

网络释义

用法例句

A type of novel interfacial additives was designed and synthesized.

设计合成了一类新型界面助剂 ,对该类助剂的性能进行了研究 ,估算出了界面助剂的性能参数。

According to the geometrical characteristics that the cross line of non revolution quadric surface and two groups of parallel plane in specific direction is circle,a method is studied in which the solid form of non revolution quadric surface being cut by given plane may be solved directly and accurately through drawing auxiliary spherical surface which contains the circles.

根据非回转二次曲面与特定方向的两组平行平面束相交为圆截面的几何特性 ,论述了通过包含圆截面作辅助球面 ,可以直接、准确地求解非回转二次曲面截交线实形的作图方法。

Therefore,the two sections are the auxiliary sections of the Wuliu section, the stratotype latent boundary se.

两个剖面中、下寒武统界线的划分和潜在的八郎乌溜剖面中、下寒武统界线候选层型剖面的划分基本一致,可作为潜在的八郎乌溜中、下寒武统层型剖面的辅助剖面。

This paper expounds the use of an auxiliary plane in seeking the point of intersection between a straight line and a plane,using a comparative analytical method.

采用对比法对辅助平面在求一般位置的线面交点中的作用进行了论述 。

Utilize auxiliary plane to solve the following problem: the point of intersection of lines, equation of the straight line, equation of the plane and the distance between lines in different planes.

利用构造辅助平面方法求:直线与直线交点;平面方程;直线方程;异面直线间距离。

Generating G~n Blending Surface Based on Auxiliary Surfaces

基于辅助面的G~n连续过渡曲面的构造方法

Study on aid-filtering behavior of surfactant type filter-aid

表面活性剂型助滤剂助滤行为的研究

I cannot is of any help in this respect.

在这方面，爱莫能助。

This kind of assistance is not unilateral.

这种帮助不是单方面的。

Personal contact is beneficial to the promotion of understanding.

面谈有助于增进了解。

fulling assistant (surface-active preparations)

漂洗辅助剂（表面活性剂）

roofing tile fastening accessories

屋面瓦固定辅助材料

terrestrial radio aids

地面无线电辅助设备

Use the keys below to help you.

下面的提示可以帮助你。

Don't be so desperate. Cheer up and face reality. God only helps those who help themselves.

不要如此绝望，高兴起来，面对事实，天助自助者。

Olympic Sponsorship to China s Local Sponsors:Pie or Pit?;

国内赞助商面对奥运会赞助:馅饼还是陷阱?

"After retracting the rear auxiliary feet, extend them until they touch the surface on which the balance rests."

旋出后面的地辅助脚至重新接触安装平面。

Study on the Grinding Surface Temperature of Ultrasonic Vibration Aided Face Grinding

超声振动辅助端面磨削表面温度场研究

A request, as for assistance, employment, or admission to a school.

申请就帮助、聘用或入学方面的申请

We may be able to help you out in some way.

在某些方面我们或许可以帮助你。

We both want to help you In some way.

我们俩都在某些方面想要帮助你。

Then you can help her with breaststroke and sidestroke.

那在蛙泳和侧泳方面，你可以帮助她。

This knowledge helped them to get a bigger catch

这方面的知识帮助他们捕到更多的鱼。