You might be able to draw curves that are perpendicular to it.
或许你可以画出每点都垂直于向量场的曲线。
I teach children how to draw curves before teaching them how to write letters.
我教小朋友写字母之前会先教他们画曲线。
It has always been easier for computers to draw straight lines and more difficult to draw curves.
对计算机而言，画直线总是会更容易，而画曲线总是会更困难。
Simple drawings might be straight lines, but you are free (just as a real artist is) to draw curves and arcs.
简单的图形可能由直线组成，但是与现实的画家一样，也可以绘制曲线和弧线。
We may draw curves which have everywhere one of these directions for a tangent, these curves are called stress trajectory.
我们可以画一簇曲线，这簇曲线处处都有一个主方向作为切线，这些曲线叫做应力轨线。
The calculation formula of extreme distance and limit interval to draw curves by straight lines on projection plane is deduced.
推导了投影平面上以直代曲的极限距离计算公式，代曲极限间隔值的探求。
If the two level curves are tangent to each other that means they have the same tangent line. That means that the normal vectors should be parallel. Let me maybe draw a picture here.
如果两个等高线相切，说明它们的切线相同，也就是说他们的法向量应该平行，我再在这里画个图。
Besides these, the graphics class exposes a lot of other convenient methods that can be used to draw other basic shapes like rectangles, curves, rounded rectangles, lines, triangles, and so on.
此外，graphics类还给出了可用来绘制诸如矩形、曲线、圆角矩形、线、三角等这类基础图形的其他便捷方法。
Finally, the numerical solutions of the azimuthal velocity were calculated and the corresponding distribution curves were draw out by assuming some parameters of the flow.
最后，通过给定的参数计算了旋转库特流切向速度分布的数值解，并绘制了相应的切向速度分布曲线。
Draw the marginal-cost and average-total-cost curves for a typical firm. Explain why the curves have the shapes that they do and why they cross where they do.
绘出一家典型企业的边际成本和平均总成本曲线。解释其形状和交点。
Provide technical platform for users to draw different types of curves.
提供技术平台，以供用户绘制不同的类型曲线。
Further, programs can draw some curves after receiving some essential factors of impacting and common parameters of rod and target.
通过输入弹、靶普通参数及碰撞的基本条件，计算程序即可给出各基本参量间的关系曲线。
Finally, the numerical solutions of the azimuthal velocity were calculated and the corresponding distribution curves were draw out by assuming some param...
最后，通过给定的参数计算了旋转库特流切向速度分布的数值解，并绘制了相应的切向速度分布曲线。
The next type of paths available are Bézier curves, available in the cubic and quadratic varieties. These are generally used to draw complex organic shapes.
接下来要介绍的路径是贝塞尔曲线，它可以是二次和三次方的形式，一般用于绘制复杂而有规律的形状。
The software MATLAB6.5 is used to calculate and draw the curves of travel, velocity and acceleration to time.
使用软件MATLAB6.5进行计算，并绘出凸轮行程、速度、加速度随时间的变化曲线。
Defines open and closed curves and how to draw and fill them.
定义开放式和封闭式曲线，并说明如何绘制及填满这类曲线。
A basic knowledge on how to use the pen tool and how to draw bezier curves is needed to get started with this tutorial.
在开始之前，你要有使用钢笔工具的基础知识，懂得如何绘制贝塞尔曲线。
Many simulation curves are given after analyzing those curves we can draw a conclusion that Model algorithm control algorithm can improve the control property of system greatly.
由各种情况的闭环输出曲线和控制量变化曲线分析比较可知，模型算法控制应用与半主动控制系统有着良好的控制性能。
Advanced drawing arithmetic: with integration of 3000 kinds of characterized graphics and union of advanced motional mathematics model, can draw complicated curves and biases quickly and smoothly.
绘图算法先进：集成3000种特征图形库并结合先进运动数学模型，可以高速流畅地绘制复杂曲线、斜线。
Draw the demand, marginal-revenue, and marginal-cost curves for a monopolist.
画出垄断者的需求曲线、边际收益曲线和边际成本曲线。
It is difficult for the computer to draw break lines, because they are irregular curves.
因波浪线是不规则的曲线，所以计算机辅助绘图有一定的困难。
So, when we meet bend and curves in the path of life. We should be more optimistic and try to make the most of the situation and draw lessons from the bumps and turns along the way.
因此，当我们在生活的道路上遇见挫折时，我们应该用更加乐观的态度来对待生活，充分利用当前的情况，从一路的坎坷中吸取教训。
The control computer in the system is used to set motion parameters to the motion controller and draw motion curves in order to assess the performance of the stage.
根据芯片封装运动特点编写的控制算法在运动控制器的高性能处理器中运行，可同时满足可编程性和实时性的要求。
Based on calculation results of all 25 lists, the author continues to draw data tables, histograms and data curves, and conducts comparison and analysis by using these charts.
再根据整个清单的数据统计结果，列数据表，画柱状图和数据点折线图，并根据图表进行比较和分析。
According to different rotatable velocity, location, communication velocity, I draw the error curves to give a concrete description of grating-shape capacitive coder dynamic and static precision.
从而取得在不同转速、不同位置、不同通讯速率下的误差曲线，进而直观地认识容栅编码器的静态和动态精度。
Procedures prepared Bezier curves like to complete the Bezier curve drawing, and is able to draw the curve data preservation and open.
程序中编写了Bezier曲线类来完成Bezier曲线的绘制，并能对绘制的曲线数据进行保存与打开。
Procedures prepared Bezier curves like to complete the Bezier curve drawing, and is able to draw the curve data preservation and open.
程序中编写了Bezier曲线类来完成Bezier曲线的绘制，并能对绘制的曲线数据进行保存与打开。
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