老川建议，直接用美国的危险城市，作为军队的训练场
看了一下美国危险城市排名
孟菲斯居然排第一
https://realestate.usnews.com/places/rankings/most-dangerous-places
Defense meeting: During a 71-minute speech to senior military leaders in Quantico, Virginia,
President Donald Trump suggested that the military use “dangerous cities as training grounds.”
