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.

The future of food security lies beneath the waves.

我能做的就是做我自己，不管那是谁。

自己不愿干的，不要强加给别人。

数学不是一项观赏性运动。你必须亲自去做才能理解它。