Remember that polar coordinates are about replacing x and y as coordinates for a point on a plane by instead r, r and theta,which is the angle measured counterclockwise from the positive x-axis.
极坐标是关于r，θ的,用r，θ代替平面上一点的x，y坐标，是从原点到那一点的距离，，which，is，the，distance，from，the，origin，to，a，point，θ是由x轴逆时针旋转,而得到的夹角。
The result is a double-layer distribution of charges-for example, a plane of negative heads and an adjacent diffuse cloud of positive counterions.
这就产生了电荷的一种双层结构分布——比如说一个负电荷的平面和紧邻着弥散着的带正电的相对离子云。
The results indicate that the application of the HRR theory is positive only in the plane stress case.
结果表明，仅仅在平面应力的条件下HRR理论的应用是肯定的。
Second, for layer crystals the Grüneisen parameter along the plane may be negative for some temperatures because of vibration film effects, but for other crystals is positive always.
对层状晶体，由于振动的膜效应，使得沿平面层方向的格林乃森参量在某些温度范围内出现负值，而一般晶体的格林乃森参量总为正值。
To analyze the formation of surface discharge on a dielectric plate under positive nanosecond impulse voltage in air, a wire to plane electrode system with a barrier of negative film was used.
采用感光胶片作为阻挡介质的针-板放电系统，解析空气中固体电介质上纳秒正脉冲表面放电的形成过程。
When the distance between positive and inverse Fourier transform system changes, the CCD is adjusted to the focal plane by variable value of interval between two peaks on CCD with computer.
通过镜组移动改变正、负傅里叶变换系统的距离，用软件比较CCD上两个波峰的间隔是否变化来对CCD进行定焦。
Thus, we give a make-graph method of conic section on plane with arbitrary point as foci, arbitrary line as directrices and arbitrary positive number as eccentricity.
从而给出了以平面上任意点为焦点、任意直线为准线，任意正数为离心率的圆锥曲线的直接作图方法。
For NC machining of plane section method, the machining path of tool cutting plane and implicit surface can be found, and the curve of the tool path is drawn by the positive-negative method.
把隐函数的优势应用到数控加工编程中，即对于截面法的数控加工，求出刀具切削平面与隐函数曲面的加工轨迹，再用正负法绘制刀具轨迹曲线。
In this paper the importance of stress positive-negative regularity on tilt section in plane problem of mechanics of elasticity is introduced and the regularity is proved.
介绍了弹性力学平面问题中斜截面上应力的正负规定的重要性及其对该规定的论证；
The influence that the anchorage effect brings to the positive stress distribution on the slip plane will be considered.
考虑锚杆锚固作用对滑面上正应力分布的影响。
The influence that the anchorage effect brings to the positive stress distribution on the slip plane will be considered.
考虑锚杆锚固作用对滑面上正应力分布的影响。
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