查询词典 geometry

Now is a good time to go back to bed if you do not know what a vertex is, but in a geometry for dummies fashion, I will let you in on the secret: a vertex is the location of a point in space, usually described by its x, y and z Cartesian coordinates.

现在是一个很好的时间去回到床上如果你不知道什么是顶点，但在时装几何傻瓜，我将让你的秘密：一个顶点是一个点的位置在空间，通常是描述其x，y和z直角坐标系。

Considered the father of analytic geometry, he formulated the Cartesian system of coordinates.

他的哲学思想基于唯理性的前提Cogito， ergo sum。

And a basic understanding of Cartesian geometry, too.

和一些理解解析几何的知识。

Cartesian geometry, too. Those are useful, and you can learn everything you need to know in a few months, give or take.

那些很有用，并且在以后几个月里，你能学到一切你想要的，十拿九稳的。

However, the similar change of the cation geometry was not observed.

然而在阳离子中没有发生相似的几何构型改变。

Here concave type of geometry is the one in which the local center of curvature of workpiece and tool center lie on the same side.

这里凹面型的几何一个在当地的中心曲率的工件和刀具中心所在站在同一边。

Each Cu ion is located at a crystallographic center of symmetry being coordinated by two N and two O atoms in a distorted square-planar geometry.

每个铜原子位于晶体中心，与两个N原子和两个O原子进行配位，形成了扭曲的平面结构。

By taking advantage of a corollary of the Desargues theorem and the corresponging extension of Desarguesian configuration, the concept of stereohomology has been defined in projective geometry and presented based on homogeneous coordinates. Consequently, a series of geometrical transformations, such as central projection, parallel projection, centrosymmetry, translation transformation, reflection, rotation transformation, which can be contained in it or derived from it have also been analytically defined.

利用Desargues定理的一个推论和引申的Desargues图形，给出"空间透射"在射影几何意义下基于齐次坐标表象的解析定义，从而解析定义了可蕴涵其中的中心投影、平行投影、中心对称、平移、反射等几何变换以及可由此衍生出的旋转变换。

He is known for familiar results in elementary geometry; for example, the Euler line through the orthocentre (the intersection of the altitudes in a triangle), the circumcentre (the centre of the circumscribed circle of a triangle), and the barycentre (the "centre of gravity," or centroid) of a triangle.

他作了很大努力来发展一个较完整的月球运动理论，它由於包含了三体问题而特别困难；在1753年发表的部分解答曾帮助了不列颠海军部对月球表的计算。1772年，通过艰钜的心算完成了他的关於月球运动的第二种理论。

Secondly, an adaptive real-time interpolation algorithm for B-spline curves is proposed combined with the chord error control and the largest centripetal acceleration control based on the differential geometry and the properties of B-spline curves.

其次，根据B样条曲线的特性以及微分几何原理，实现了一种带弦高误差控制和法向最大加速度控制的进给步长自适应B样条曲线实时插补算法。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。