observing location
观察位置
以上为机器翻译结果，长、整句建议使用 人工翻译 。
By observing which dragon had dropped its ball, Chang Heng could ascertain the location of the quake.
通过观察哪条龙的珠子落下，张衡可以确定地震的方位。
youdao
A navigator can know the latitude of his ship by observing the location of stars, where the sun rises in the morning and sets in the evening, and what time of year it is.
VOA: special.2010.07.14
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