| 1. | Let us draw the circle with center at o and radius equal to a . 我们以点O为圆心,以a为半径,作圆。 |
| 2. | At a smaller distance, the square reappears while the circle disappears . 缩短距离时,这正方形重现而圆消失。 |
| 3. | Rivenoak reappeared in the circle and occupied his old place . “老橡树”又来到人群中,照例站在原来的位置上。 |
| 4. | What is the fewest number of times the bug needed to cross the circle ? 问昆虫至少要穿过圆几次才能离开这张纸? |
| 5. | The circle has greater area than a regular poiygon of the same perimeter . 圆的面积比同样周长的正多边形的面积大。 |
| 6. | The circle has greater area than a regular polygon of the same perimeter . 圆的面积比同样周长的正多边形的面积大。 |
| 7. | We focus our attention on the circled x's which signal redundancy . 我们所关注的是有(x)标记处,这表明是一个多余的关系。 |
| 8. | He felt creeping of fate, the circling of wolves, the hover of vultures . 他感到厄运已经来到,豺狼正在包围,秃鹰也在盘旋。 |
| 9. | Given the two points, one can construct the points of intersection of the line and the circle . 给定了两点就可以画出这直线和圆的交点。 |
| 10. | the circumference of the circle is 2πr and the time for one revolution is 2πr/v. 圆的周长是2r,转一圈的时间是2rv。 |