a circle

They stood in half a circle.

他们站成半圆形.

Jenny has a wide circle of friends.

珍妮交友甚广。

The children had a dance in a circle.

孩子们围成一圈跳舞.

Chairs in rows are not as conducive to discussion as chairs arranged in a circle.

椅子成排摆放不如成圈摆放便于讨论。

The process is not a circle but rather a spiral

这个过程不是一个圆周运动而是螺旋上升型的。

The axis of a circle is its diameter.

圆的轴线是其直径.

We stood in a circle holding hands.

我们站成一圈，手牵着手。

They formed a circle and sang 'Auld Lang Syne'

他们围成一个圆圈，唱起了《友谊地久天长》。

a narrow circle of friends

有限的交友圈子

She has a wide circle of friends.

她交游很广。

Twist the wire to form a circle.

把铁丝弯成一个环。

She walked the horse round in a circle.

她牵着马兜圈子。

the centre of a circle

圆心

They had just had enough time to swim out of danger when the boat again completed a circle.

他们刚游出危险区,这时快艇又完成了一圈的运动.

Draw a circle.

画一个圆圈。

A diameter passes through the center of a circle.

直径从圆心穿过.

All points on a circle are equidistant from the centre.

圆周上各点离圆心的距离相等。

A group of people made a circle around the Pentagon.

一群人在五角大楼四周围成一圈。

The children gather round in a circle.

孩子们围成了一圈.

He drew a circle in the sand with a stick.

他用枝条在沙地上画了一个圆。

This is a chord of a circle.

这是个圆的弦.

The diameter and the circumference of a circle correlate.

圆的直径与圆周有相互关系.

The children stood in a circle.

孩子们站成一圈。

The monument consists of a circle of gigantic stones.

该遗址由一圈巨大的石碑组成。

I wrote down the number 46 and drew a circle around it.

我写下46这个数字，又画了个圆将它圈起来。

Both men had just begun to swim towards the shore, when they noticed with dismay that the speed-boat was moving in a circle.

这两个人刚刚开始向岸边游去, 这时他们突然惊愕地看到快艇正在作圆周运动.

Any two diameters of a circle intersect each other.

圆周内两直径必相交.

The monument consists of a circle of gigantic stones

纪念碑由一圈巨石组成。

We've lost our way and I am sure we are wandering in a circle. We started from that old dead tree there and have come back to it.

我们迷了路,我确信我们又兜回到了原处. 我们从那棵老枯树那儿出发而现在又回到了原地.

This formula is used to calculate the area of a circle.

这个公式用于计算圆的面积。