| 释义 |
Examples:parametrization by arc length (of a space curve)—unit of angle or arc equivalent one sixtieth of a degree—also called Jehanne Darc, the Maid or Orleans, Joan of Arc or St Joan—concentric arc (in spherical geometry)—Joan of Arc (1412-1431), French heroine and liberator, executed as a witch by the Burgundians and English—Jeanne d'Arc (1412-1431), French heroine and liberator, executed as a witch by the Burgundians and English—arc length (the length of a curve segment)— |