He had to go into the woods alone that year because Seth had moved to another part of the country.

VOA: special.2010.06.26

If you go to another neighboring country, that's what they think is naturally x and y.

如果你们到了另一个相邻的国家,这就成了他们所惯用的 x 和 y 方向

耶鲁公开课 - 基础物理课程节选