Also, keeping a world map up to date is hard because the external world is always changing.

另外，因为外部环境总是在变化，所以很难让环境地图符合最新情况。

youdao

If you want to find an up-to-date map of Haiti, then there is only one place to go.

如果你想找到一幅海地的最新地图，那么就只有一个地方可去。

youdao

If you want to find an up-to-date map of Haiti, then there is only one place to go.

如果你想找到一幅海地的最新地图，那么就只有一个地方可去。

youdao