If they kept on going, and the next night they saw the pair of stars setting separately, then they would know that they were at a different degree of latitude.
如果他们继续走，第二天晚上看见这两颗星星分别落下，就知道他们在不同的纬度上了。
What you need from a search service is a PHP page that takes a latitude and longitude pair, along with a radius, and returns any articles that have a location with that circle.
对于搜索服务，您需要的是一个php页面，该页面使用纬度和经度对以及半径，并且返回与该圆具有一定位置关系的任何文章。
This data object merely wraps a pair of latitude and longitude values.
数据对象只用来包装经度和纬度值对。
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