translation.en: When external resources are scarce, you have to go within yourself to tap the most abundant resource, human ingenuity, and use that ingenuity to find clever ways to solve problems with limited resources.
translation.zh: 当外部的资源稀少时， 你就不得不靠自己去挖掘 最丰富的资源——智慧， 并且以人类的聪明才智， 来利用有限的资源巧妙地解决问题。