translation.en: So we went for a walk on the beach and I said, well, give me one of your big problems. Give me a design challenge, sustainability speed bump, that's keeping you from being sustainable.
translation.zh: 所以我们在海滩上走着，我说， 提出一个你们最大的困难给我。给我一个你们在设计上遇到的难题， 在可持续性方面的绊脚石，一个让你们的设计达不到可持续性的问题。