I made a promise that the next time I would fly around the world, it would be with no fuel, independent from fossil energies, in order to be safe, not to be threatened by the fuel gauge.
一个承诺，我将会进行下一个环球飞行 这将是无燃料， 完全不依靠陈旧的矿物能源， 为了安全起见， 不会受到燃料容量不够的威胁。