NASA launched its Mars helicopter Ingenuity from the surface of the Red Planet on Monday, marking the first powered, controlled flight of an aircraft on another planet.
4月19日，美国国家航空航天局的"机智"号无人直升机成功完成了在火星上的首次飞行，这是人造航空器首次在另一个行星上受控飞行。

[Photo/Xinhua]

The solar-powered helicopter first became airborne at 3:34 am Eastern Time, a time the Ingenuity team determined would have optimal energy and flight conditions.
"机智"号试飞时间为美国东部时间4月19日3时34分，"机智"号团队认为这一时间点有最佳的能量和飞行条件。

The Ingenuity team confirmed the flight succeeded after receiving data from the helicopter via NASA's Perseverance Mars rover at 6:46 am ET.
"机智"号无人直升机由太阳能电池板充电。任务团队于美东时间当天6时46分接收到"机智"号通过"毅力"号火星车传回地球的数据，确认首飞成功。

Altimeter data indicates Ingenuity climbed to its prescribed maximum altitude of three meters and maintained a stable hover for 30 seconds, according to NASA.
高度计数据显示，"机智"号上升至预设的3米飞行高度，悬停约30秒，随后降落并顺利在火星着陆。

It then descended, touching back down on the surface of Mars after logging a total of 39.1 seconds of flight.
整个飞行过程持续了39.1秒。