| 释义 |
〔vane〕A sight on a quadrant or compass.照准器：象限仪或罗盘上的准星〔Gunter〕English astronomer and mathematician who invented a surveying chain, quadrant, and scale and introduced the trigonometric termscosine and cotangent. 冈特，埃德蒙：(1581-1626) 英国天文学家和数学家，发明了测链，象限仪和标尺，并引进了两个三角学术语，余弦 和 余切 〔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 |