customs area

• 海关境界

customs area的用法和样例：

例句

1. In the narrow water area with lofty ridges and towering mountains, it's rapid and meandering.
   有时流到很逼狭的境界，两岸丛山跌岭，绝壁断崖，江河流于其间，回环曲折，极其险峻。