直角

The square has four equilateral line and four right-angle.

正方形有四条等边和四个直角。

Enhancement forearm muscle: Erectness, both hands grasping dumb bells, two arms curving right angle, moving dumb bells up-and-down and right-and-left.

增强前臂肌：直立，双手抓哑铃，两臂弯曲成直角，将哑铃上下左右移动。

Note that I just made a 90 degree turn and didn't fall out of the sky!

请注意，我刚做了一个90度直角转弯，而且没有从空中掉高度！

THERE are signs that Manhattan society's recent fastidiousness about home renovation — the mania for right angles, the fetishizing of ancillary elements like hinges and drawer pulls — may be on the wane.

有很多方面展露出，曼哈顿岛最近开始对家具装饰由为严格起来--狂迷直角设计，追逐一些辅助摆设比如说是铰链和牵引之类--的时代已经退却。

By using the method of expanding the aperture function into a finite sum of complex Gaussian functions, approximate closed-form propagation equations of TMn0-Gaussian beams diffracted by hard-edged parallelogram aperture s are derived.

通过将硬边光阑函数展为复高斯函数之和的方法，在直角坐标系下研究了TMn0模高斯光束通过有平行四边形光阑的衍射，得到了近似的解析传输公式。

Give the coordinate equation of rotor linear .on the 3-section curve within the first quadrant of the rectangular coordinate, show the program block diagram of computer, and give the results of the sample.

给出了转子型线在直角坐标系第一象限内三段曲线的坐标方程式，列出了计算机程序框图，给出了实例结果。

By using the method for positive term resolution of equations of higher degree, all non-zero real roots of a real coefficient equation of higher degreewere obtained by determiningthe abscissas of intersection points of two monotonically increasing concave functions in the first quadrant of a planar rectangular coordinate system.

用高次方程正项分解方法，将求解实系数高次方程非零实数根的问题，转化成求解两单调上升凹函数在平面直角系第一象限内交点横坐标的等价问题；给出了基于共享存储多指令流多数据流并行计算模型求解任意实系数高次方程全部实数根的大范围收敛性异步并行迭代算法，并分析了算法计算的复杂程度。

Draw a line from your position to form a right angle to the ball's flight line.

从你的位置往球的飞行路线上画一个直角。

Making use of I1 ,I2 ,I3 position Centrifugal rate e and half focal chord p can be calculated. Therefore its easy to transform the equation of the right - angled coordinate branch into polar coordinate equation.

利用I1，I2，I3可以计算出离心率e和半正焦弦p因而可以很容易的直接把直角坐标系中的方程转化为极坐标方程。

Foursquare has four equal edges and four corners.

正方形有四条等边和四个直角。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。