| 单词 | 圆弧 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔cyclometer〕An instrument that measures circular arcs.圆弧测定器：一种用于测定圆弧的仪器美国传统〔describability〕The rainbow described an arc in the sky.彩虹在天空形成了一道圆弧。21世纪英汉〔great circle〕A segment of such a circle representing the shortest distance between two terrestrial points.大圆弧：大圆的一部分，表示球面上两点间的最短距离美国传统〔round〕The corners are round.这些转角是圆弧形的。韦氏高阶〔secant〕The straight line drawn from the center through one end of a circular arc and intersecting the tangent to the other end of the arc.正割线：从圆心引出的经过圆弧一个端点并与另一端点正切交割的直线美国传统〔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 |
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