translation.en: After we were pretty much convinced we had a good design, and we'd have to make all the standard engineering trade-offs you always make -- you can always get three out of four of anything you want; the weight, the size, the cost, the functionality -- I put a bunch of guys in my plane and I said, "We're flying down to Walter Reed, and we're going talk to these kids,
translation.zh: 在我们确信我们设计得很好了后， 我们还需要做所有工程师都做的取舍。 通常你可以从四样想要的东西中选出三样来， 比如在重量，大小，花费，功能里进行挑选。 我把一帮人带上了飞机， 我告诉他们我们现在要去沃尔特里德医院，去和那些孩子们聊天。