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。
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。
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。
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