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1·The astrolabe had long been the primary instrument for navigation, having been introduced in the eleventh century.

自11世纪星盘被引入以来，它一直都是航海的重要工具。

2·Mariners were also able to fix their latitude by using an instrument called astrolabe.

海员们还可使用星盘这种仪器确定纬度。

3·On the astrolabe, an off - centered circle represents the orbit of the sun - the ecliptic.

在星盘上，一个偏心的圆代表了太阳的运行轨道——黄道。

4·Mariners were also able to fix their latitude, by using an instrument called an astrolabe.

海员们还可使用星盘这种仪器确定纬度。

5·The observing result of a photo electric astrolabe is largely affected by the processing method of photo counting data.

在光子计数资料的处理方法设计不完善时，有可能会大大影响光电等高仪的观测结果。

6·A study of the rule of the diurnal variation of latitude and longitude, obtained with the astrolabe in Shanghai, leads us to the hypothesis that the diurnal var...

在此基础上求出了组间差变化率曲线，进而分析研究了上海地区等高仪经纬度测量值周日变化的规律。