But only some of them are walkable.

但是，只有其中一些是步行游览。

San Francisco most walkable U.S. city, website says.

旧金山获评美国最适合步行的城市。

This allows us to reason about the whole walkable area.

这允许我们推断出整个可行区域。

If it is not walkable or if it is on the closed list, ignore it.

如果它不可行走，或者存在于封闭列表，忽略它。

They settled in a walkable area near a pleasantly busy town center.

他们令人愉悦的繁忙的镇中心一个易于步行的区域安了家。