| 单词 | great circle |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔celestial longitude〕The angular distance eastward from the vernal equinox to the great circle drawn through the pole of the ecliptic and a celestial body.黄经：向东从春分至通过黄经极及一个天体所画的大圆圈之间的角距离美国传统〔equator〕A similar great circle drawn on the surface of a celestial body at right angles to the axis of rotation.天球赤道：在天体表面与自转轴成直角的大圆美国传统〔hemisphere〕A half of a sphere bounded by a great circle.半球：一个巨大圆周所包围的球体的一半美国传统〔hour circle〕A great circle passing through the poles of the celestial sphere and intersecting the celestial equator at right angles.子午线：通过天体球两极，与天体赤道成直角相切的大圈美国传统〔meridian〕An imaginary great circle on the earth's surface passing through the North and South geographic poles. All points on the same meridian have the same longitude.过两极的大圆：一个通过地球表面南北两极的假想线圈。同一子午线上的所有点都具有相同的经度美国传统〔meridian〕Astronomy A great circle passing through the two poles of the celestial sphere and the zenith of a given observer.【天文学】 天体的经线：通过天体上两极和一假定观测物天顶的大圈美国传统〔meridian〕Either half of such a great circle from pole to pole.子午线：从极点到极点的大线圈的一半美国传统〔spherical angle〕The angle formed at the intersection of the arcs of two great circles.球面角：球的两个大圆交弧的夹角美国传统〔spherical polygon〕A part of a spherical surface that is bounded by arcs of three or more great circles.球面多边形：球面上由三个或更多个大圆圆弧界成的部分美国传统〔spherical triangle〕A triangle the three sides of which are arcs of great circles.球面三角形：其三边为球面大圆圆弧的三角形美国传统〔vertical circle〕A great circle on the celestial sphere that passes through the zenith and the nadir and thus is perpendicular to the horizon.平经圈：与水平线垂直的宇宙天体范围内的大圈，它经过天顶和地点美国传统 |
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