Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.

做数学就是探索一个思想的宇宙，唯一的限制是你的想象力。

采矿技术的创新不仅仅是效率问题，还关乎安全和可持续性。