translation.en: So we looked at the birds, and we tried to make a model that is powerful, ultralight, and it must have excellent aerodynamic qualities that would fly by its own and only by flapping its wings.
translation.zh: 所以我们仰望鸟儿， 并尝试去建一个模型 这个模型必须超轻， 并且具备卓越的空气动力性能 从而拥有通过扇动翅膀 来真正飞翔的能力。