translation.en: I saw the concept first in the DARPA Grand Challenges where the U.S. government issued a prize to build a self-driving car that could navigate a desert.
translation.zh: 我第一次得知这个概念 是在美国国防部高级研究计划局举办的无人驾驶汽车大赛上， 在该赛事上，能成功穿越一片沙漠的无人驾驶汽车