亚马逊加速配送竞赛：美国数十城市上线30分钟达服务

亚马逊加速配送竞赛：美国数十城市上线30分钟达服务

Amazon accelerates delivery race with 30-minute dropoffs in dozens of U.S. cities

Amazon has been gradually speeding up its delivery windows, after getting customers hooked on two-day and next-day shipp…