| 单词 | 半径 |
| 释义 | 〔quadrant〕The plane area bounded by such an arc and two perpendicular radii.四分之一圆，扇形体：由九十度弧与两条垂直的半径围成的平面图形〔sector〕The portion of a circle bounded by two radii and the included arc.扇形：由两条半径和其间的弧组成的圆的一部分〔Venus〕The second planet from the sun, having an average radius of 6,052 kilometers (3,760 miles), a mass 0.815 times that of Earth, and a sidereal period of revolution about the sun of 224.7 days at a mean distance of approximately 108.1 million kilometers (67.2 million miles).金星：离太阳第二远的行星，它的平均半径为6,052公里(3,760英里），质量是地球质量的0.815倍，它在离开太阳约为108,100,000公里(67,200,000英里）的中等距离时绕太阳转的公转周期为224.7天〔radian〕A unit of angular measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°17′44.6". See table at measurement 弧度：平面角的一种衡量单位，其大小为长度等于半径的弧对的圆心角，1弧度角约等于57°17′44.6" 参见 measurement〔radial〕Moving or directed along a radius.沿着或向着半径移动的〔semidiameter〕The apparent radius of a celestial body when viewed as a disk from Earth.半径：一般指从地球上看到的象圆盘的球形天体的二维平面半径〔anamorphic〕Having, producing, or designating different optical magnification along mutually perpendicular radii:失真的，变形的：沿互相垂直的半径出现、产生或指示不同的光学放大效果的：〔quadrant〕An early instrument for measuring altitude of celestial bodies, consisting of a 90° graduated arc with a movable radius for measuring angles.象限仪：用来测量天体纬度的一种早期工具，由一个有90度刻度的圆弧和一个用来测量角度的可移动的半径构成〔throw〕The radius of a circle described by a crank, cam, or similar machine part.（曲轴的）半径：曲柄、凸轮或类似机器部件形成的圆的半径〔alidade〕from Arabic al-'iḍādah [the revolving radius of a circle] 源自 阿拉伯语 al-'iḍādah [圆的旋转半径] 〔octant〕The area enclosed by two radii at a 45° angle and the intersected arc.八分圆：一个被两条成45°角的半径及与之相交的弧所包围的区域〔Mercury〕The smallest of the planets and the one nearest the sun, having a sidereal period of revolution about the sun of 88.0 days at a mean distance of 58.3 million kilometers (36.2 million miles) and a mean radius of approximately 2,414 kilometers (1,500 miles).水星：行星中最小且离太阳最近的星，围绕太阳公转所需的周期为88.0天，公转的平均距离约为58,300,000公里（36,200,000英里），平均半径约为2,414公里（1,500英里）〔Saturn〕The sixth planet from the sun and the second largest in the solar system, having a sidereal period of revolution about the sun of 29.5 years at a mean distance of about 1,425,000,000 kilometers (886,000,000 miles), a mean diameter of approximately 119,000 kilometers (74,000 miles), and a mass 95 times that of Earth.土星：距太阳第六远的行星，是太阳系中第二大行星，绕日公转周期29.5年，公转平均半径约1,425,000,000公里(886,000,000英里），平均直径大约119,000公里(74,000英里），质量是地球的95倍〔radial〕A radial part, such as a ray, spoke, or radius.放射部：辐射状的部分，如光线、轮辐或半径 |
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