translation.en: One could say that a helicopter does pretty much what the hummingbird does, and gets around in much the same way, and it's true, but a helicopter is a very complex device.
translation.zh: 有人会说直升飞机 正是模拟了蜂鸟的飞行 并且像蜂鸟一样到处飞，的确如此 但是，直升飞机是一个非常复杂的设备。