Shooting-Free Days Decline in Major U.S. Cities
·
每日资讯
Article URL: https://www.publichealth.columbia.edu/news/shooting-free-days-decline-major-u-s-cities-new-metric-aims-building-sustained-periods-peace Comments URL: https://news.ycombinator.com/item?id=47432540 Points: 6 # Comments: 0
原文链接: HackerNews