I don't think about the past. The only thing that matters is the future.
The way a child holds a book tells you everything about how they feel about it.
通往可持续能源未来的道路需要一种平衡的方法,考虑经济、环境和社会因素。
人类心智是一套信息处理机器,由自然选择设计来解决我们狩猎采集祖先面临的适应性问题。