查询词典 a circle

Nobody knows why, but the paint on the floor formed an arc of a circle (a centre of the circle lies inside the hall).

也不知道为什么。地板上的油漆构成了一个圆弧。

To further understand the concept of a circle, distinguish the perimeter and the area of a circle..

进一步熟记圆的概念，区分圆的周长和面积。

Further study the names of all the parts of a circle and how to work out the perimeter and the area of a circle.

复习圆的有关知识，进一步熟悉了圆各部分的名称，以及圆周长和面积的计算方法。

Student: The size of the plane which a circle occupies is called the area of a circle.

生：圆所占平面大小叫做圆的面积。

The point in the middle of a circle is called the center of a circle.

把圆中心的一点叫做圆心，圆心一般用字母 O 表示。

The results show that when the cone angles are equal to a series of special values incident beams normal to the bottom surface of a cone passing through this cone will exit along its generatrices,and form a circle-type spot on the plane perpendicular to the axis of cone,all its energies is concentrated in the circle.

结果显示圆锥体的顶角等于一系列特定值时，垂直圆锥体底面入射的光束经过该圆锥体后光束沿着其母线方向出射，在垂直于圆锥体轴线的平面上形成一圆周型光斑，其光能量全部集中在圆周上。

It doesnt teleport you to a desirable place but imagine a circle on your screen and youre teleported to a place in the circle.

它doesn't电讯您一个理想的地方，但想象一个画面上的圆圈和您选择远距传送到一个地方的圆圈。

Coarse adjustment calibrated dials by slide gauge. When the hand wheel swivels a circle, the gauge moves a scale. The fine adjustment calibrated diala are displayed by circular dial, when the hand wheel swivela 1/10 circle,the dial changes a value.

粗调刻度是通过滑动标尺显示，手轮每旋转一圈，标尺滑动一格，精调是由圆周式刻度盘显示，手轮每转动1/10，刻度盘变换一个数值，用小螺丝刀拧动手轮顶部中心的顶盖螺丝，并取下。

Stonehenge is a megalithic1 monument on the Salisbury Plain in Southern England, composed mainly of thirty upright stones (sarsens2, each over ten feet tall and weighing 26 tons), aligned in a circle, with thirty lintels3 (6 tons each) perched horizontally atop the sarsens in a continuous circle.

史前巨石阵是位于英格兰南部索尔兹伯里平原上的一个巨石建筑遗址它主要由30块竖立的巨石（为砂岩残块，每块高10英尺多，重26吨）组成，呈一个圆圈，在砂岩残块上横放着30个过梁（每一个6吨重），也呈一个连续的圆圈。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。