translation.en: And one thing: it's important not for only your own city; every city, besides its normal problems, they have a very important role in being with the whole humanity.
translation.zh: 还有一点：这很重要，不仅是针对你们的城市 每个城市，不仅是那些普通的问题 城市有它们的角色--一个非常重要的角色-- 它们伴随着人类