长春市是吉林省省会所在地，为东北五大城市之一。
Changchun is the provincial capital of Ji Lin province and one of the five bigest cities of the Northeast.
石油主要蕴藏在西北地区，其次为东北、华北地区和东部沿海浅海大陆架。
Petroleum reserves are mainly in northwest and also in northeast China, north China and the continental shelves in east China.
从注释中可以看到，这些值规定幻灯片的移动范围为东北、东南、西北和西南的任意组合。
As you can see from the comments, these ranges specify movement of the slide from each combination of northeast, southeast, northwest, and southwest.
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