translation.en: And, I mean, first of all we -- nobody had actually crossed the Atlantic in a hot air balloon before, so we had to build a hot air balloon that was capable of flying in the jet stream, and we weren't quite sure, when a balloon actually got into the jet stream, whether it would actually survive the 200, 220 miles an hour winds that you can find up there.
translation.zh: 首先，我们-- 以前从来没人坐热气球横跨大西洋 我已我们必须设计出适应高速气流的热气球 我们自己也是疑虑重重 当气球行驶在高速气流中时 它能否挺过时速200220里的高空气流