方向就是轨道的切线方向。
SVG可以使图像转向，以便它总是面向它所移动方向的切线。
SVG can turn an image so it always faces the tangent of the line it is following.
如果你想要严格的近似等式,那就意味着我们要用切线逼近来取代原函数。
If you want strict equalities in approximations means that we replace the function by its tangent approximation.
他的样本跨度比我的要大多了，所以他得出的切线资产组合会和我的不同。
Now, he's using a much longer sample than I did, so he's not going to get this tangency portfolio that I did.
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。
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.
我需要画出这个圆的一条切线吗？
画出该曲线两个分支的两条切线。
稳定的自动切线功能提高了工作效率。
The steady automatic tangent line function has improved working efficiency.
一个凹函数的图象总在它的切线的下方。
The graph of a concave function is always below its tangent.
记者：你的网名“黑暗切线”是怎么来的？
Reporter: Where did your handle, "The Dark Tangent" come from?
本文给出了切线极坐标下的齿轮啮合方程式。
The mesh equations of gears are given by tangent polar coordinate system.
程序员必须提供每个顶点的切线、副法线和法线。
An application programmer must supply a tangent, binormal, and normal at each vertex.
目的：评价胸壁切线野照射ct模拟定位的价值。
Objective: To appraise the value of tangential chest wall irradiation with ct simulation.
介绍了切线初始位移法在求解制造线形中的应用。
The application of tangent-initial-displacement method in solving fabrication geometry is introduced.
这条线叫做共切线，是系统用来改变曲线形状的。
This line, called a cotangent line, is used by the system to modify the curve.
所有的控制顶点仅仅由切线多边形的顶点直接产生。
The all control points can be generated simply by the vertices of the given tangent polygons.
建构一动态绘图。展示给定的心脏线外一对的正交切线。
Construct an animation displaying a pair of orthogonal tangents of a fixed cardioid.
松散岩块的切线模量和割线模量均与轴向应变呈指数相关性。
Both the tangential modulus and secant modulus are exponential with axial strain.
目的测定细胞离体培养中的人视网膜胶质细胞切线方向收缩。
Objective To measure the tangential contraction of human retinal glial cell in vitro.
这就意味着所有环绕太阳的行星都会沿切线方向飞离环绕轨道。
This means that all of the planets revolving around the sun would fly out of orbit right away.
因为法线贴图会被映射到表面上，所以它已经是在切线空间中了。
Because the normal map is mapped to the surface, it already lies flat in tangent space.
考虑了常规三轴试验和各向同性压缩试验对切线体积模量的影响。
The different influences on tangent bulk modulus of conventional triaxial test and isotropic compression test were considered.
我希望我是你的导数，这样我就能成为一条切线，躺在你的曲线上。
I wish I was your derivative so I could lie tangent to your curves.
在图片中，一个KIK锁芯在切线处被钻孔，以便让锁芯自由的转动。
In this photo, the plug of a KIK cylinder has been drilled at the shear line, allowing the plug to freely rotate.
上盘岩块相对地变动不大，而其下的矿石带却具有许多切线运动的证据。
The hanging wall block is relatively little disturbed, but the ore zone beneath bears abundant evidence of tangential movements .
只有切线方向的位移间断，而法线方向位移连续的弱界面称之为滑动界面。
The imperfect interface with a continuous normal displacement and a jumped tangential displacement is called a sliding interface.
只有切线方向的位移间断，而法线方向位移连续的弱界面称之为滑动界面。
The imperfect interface with a continuous normal displacement and a jumped tangential displacement is called a sliding interface.
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