英语语法分析

Topo: Short for toponym (see the GeoNames documentation).

topo： toponym的缩写(参见geonames文档)。

Relay control circuit can be understood as a topo graph.

继电控制线路原理图可以抽象为网络拓朴图。

I also inverted the topo lines to give them more contrast with the ground.

我也将地形线翻转过来，这样和地面形成鲜明的对比。