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1·Are the lines perpendicular to each other?

这些直线相互垂直吗？《牛津词典》

2·The sides of the mountain are almost perpendicular.

山的两侧几乎是垂直的。《柯林斯英汉双解大词典》

3·What she's going to do is to start loading up the electrons, and you see this wand here move slowly, and start become perpendicular.

她要做的是开始加载电子，你可以看到这个棒子移动得很慢，并开始变得垂直了。

4·The wall is a little out of the perpendicular.

墙壁有点倾斜。《牛津词典》

5·The left wing dipped until it was perpendicular to the ground.

左翼下垂至与地面成90度角。《柯林斯英汉双解大词典》

6·We made two slits for the eyes and a perpendicular line for the nose.

我们划了两道缝儿做眼睛,一条竖线做鼻子。《柯林斯英汉双解大词典》

7·Let AB be perpendicular to CD.

设ab垂直于CD。《新英汉大辞典》

8·When a surface is perpendicular to the rays, their intensity is at its maximum.

当表面与射线垂直时，射线的强度最大。《新英汉大辞典》

9·It's a vector, perpendicular.

一个与半径垂直的矢量。

10·So, the gradient is perpendicular.

所以，梯度向量是垂直的。

垂直

1·The sides of the mountain are almost perpendicular.

山的两侧几乎是垂直的。《柯林斯英汉双解大词典》

2·What she's going to do is to start loading up the electrons, and you see this wand here move slowly, and start become perpendicular.

她要做的是开始加载电子，你可以看到这个棒子移动得很慢，并开始变得垂直了。

3·Let AB be perpendicular to CD.

设ab垂直于CD。《新英汉大辞典》

4·The researchers found that if they stretched out the substance in a second direction perpendicular to the first, it could then be stretched in any direction without harm.

研究人员发现，如果向着第一次拉伸的垂直方向拉扯，它仍然能够向着任何方向毫无损害地任意伸展。

5·A severe facade rose above this door; a wall, perpendicular to the facade, almost touched the door, and flanked it with an abrupt right angle.

大门的上方便是那房屋的正面，气象庄严，一道和房屋正面垂直的墙紧靠在大门旁边，构成一个生硬的直角。

正交的

1·The parameters of synthesizing technology of traditional melamine resin Superplasticizer were optimized, and the distinct parameters were ascertained through the perpendicular experiments.

以正交试验为基础优化了传统密胺树脂高效减水剂的合成工艺参数，找出了显著影响因素。

2·Through the rotating, regressive and perpendicular experiment and the deep study of the effect of wheat yield between different fertilizer quantity and density.

本文根据旋转回归正交试验，深入研究探讨了不同肥量、密度条件下对小麦产量的影响。

3·The technological process of coprecipitation for preparing PZT piezoelectric ceramic powders is studied through perpendicular experiments.

采用正交实验方法研究了共沉淀法制备PZT压电陶瓷粉体的工艺过程。

4·This paper introduces system analysis method, perpendicular analysis method, experimental schedule arrangement and management that adopted in emission experiment of vehicle's ICE.

本文介绍了系统分析法、正交分析法、优化技术、试验计划安排和管理等方法和手段在车用内燃机排放试验中的应用。

5·Through the rotating, regressive and perpendicular experiment and the study of the effect of spring wheat yield between different fertilizer quantity and density.

根据旋转回归正交试验，研究探讨了不同肥量、密度条件下对春小麦产量的影响。

垂线

1·Analog mechanism model include four bar linkage, crank and sliders mechanism, speed returning mechanism, perpendicular mechanism.

模拟的机构模型有四杆机构、曲柄滑块机构、速返机构、垂线机构等。

成直角

1·The wall must be perpendicular to the floor.

墙壁必须与地板成直角。