NASA announced this afternoon that it plans to launch a tiny, four-pound, autonomous helicopter along with its 2020 rover mission. And if you think this sounds relatively cool, well: youre right.今天上午英国国家航空暨太空总署(NASA)白鱼送过来小型、大概四磅（3.6斤）的无人直升机已完成今年 的火星观察每日任务，假如你确实听得一起非常好，那么就正确了。The experimental, softball-sized drone would be the first airborne vehicle to fly around within Marss atmosphere other than the landers that have delivered other, ground-based rovers.这架铅球尺寸的试验无人飞机，有别于以前送到火星土层上探测器，它被必需送到火星的大气层。In order to design a flying vehicle that would actually work on another planet, NASA scientists faced a number of chanllenges.为了更好地使这个四轴飞行器的确必须在火星上经营，NASA的生物学家遭遇了一系列的挑戰。For example: the Red Planets particularly-weak atmosphere and the communication delay between ground control here on Earth and the rover.例如，火星的大气层十分的薄，并且探测器和地球上的操控沟通交流不容易有一定的廷时。
Traveling at the speed of light, itll still take several minutes for any commands sent from Earth to reach the helicopter, so the flying rover will have to be at least partially autonomous as it provides scientists and other autonomous vehicles with the first long-term birds-eye view of the planet.虽然传输速度是超快速，从地球上起飞出带的数据信号到达探测器的情况下還是务必十多分钟，因此该探测器全自动流水线地为生物学家和别的自动仪器长时间获得火星全景图。Also, the Martian atmosphere is practically non-existent. The air pressure at the planets surface is lower than it is at a helicopters maximum altitude when flying above Earth.加上，火星的大气层彻底没不会有觉得，大气层的高度比观察机的横着高度比在地球上航行里时的最高值也要较低。
In order to take off, the tiny flying robot needs to spin its two blades ten times faster - 3,000 times per minute - than it would on Earth while carrying batteries and other hardware crafted to be as light as possible.因此就算是四轴飞行器装车最大的充电电池和硬件配置机器设备着陆，2个飞机螺旋桨的还要比地球上起飞时扭距慢10倍，超出每分3000并转。When the rover arrives at Mars in February 2021, itll perform scouting missions to look for ideal landing zones on the surface, as well as scan the planet for signs of life, hazards that might matter to the future astronauts who finally venture to Mars.预估今年 二月到达火星，根据在火星上完美着陆来已完成可行性分析勘察工作中，探察在火星上否有性命不会有征兆，及其将来航天员登岸火星有哪些危险因素要素等难题。
Itll also assist with the ongoing geology research currently underway by ground-based rovers.它还不容易协助目前陆上探测器来已完成地理研究。
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