The white egg-shaped drone started with a flutter and then a whirr as it lifted its sole passenger about 20 metres into the air, hovering for about a minute before returning to the ground.
那架白色蛋壳状的无人驾驶飞行器先是转动起机翼，然后发出一阵轰鸣，载着唯一的乘客升到空中约20米处，盘旋约1分钟后返回地面。
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