英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Arc的结果
Arc
(n.)
A portion of a curved line; as, the arc of a circle or of an
ellipse.
Arc
(n.)
A curvature in the shape of a circular arc or an arch; as, the
colored arc (the rainbow); the arc of Hadley's quadrant.
Arc
(n.)
An arch.
Arc
(n.)
The apparent arc described, above or below the horizon, by the
sun or other celestial body. The diurnal arc is described during the
daytime, the nocturnal arc during the night.