But when it comes to cities, the conversation is dominated by the North, that is, North America, Western Europe, Australia and Japan, where violence is actually at historic lows.
但说到城市， 话题大都由北部地区主导， 所谓北部地区， 是指北美、西欧、澳洲和日本， 这些地区的暴力率 处于历史新低点。