translation.en: This is a real challenge to do this, because animals, when you start to really look inside them -- how they work -- appear hopelessly complex. There's no detailed history of the design plans, you can't go look it up anywhere.
translation.zh: 做到这点真不容易，因为 当你真的去研究动物，它们的机理 看起来复杂得令人绝望。“设计方案” 没有详细的历史备案可以随时查阅