| 《About That》乌克兰军方称，他们完成了世界上首次在前线用空中无人机后送受伤士兵的行动。安德鲁·张解释其运作方式，并拆解了此次行动背后的工程挑战与身体风险。图片由加拿大通讯社、路透社、Adobe Stock 和盖蒂图片社提供。
Ukraine says this drone can fly injured soldiers off the front line | About That Ukrainian forces say they completed the world’s first front-line aerial drone evacuation of an injured soldier. Andrew Chang explains how, breaking down engineering challenges and physical risks behind the operation. Images provided by The Canadian Press, Reuters, Adobe Stock and Getty Images