If we don’t take responsibility for our plastic waste today, we’ll leave a burden too heavy for future generations to bear.

Take away love and our earth is a tomb.

I am made and remade continually. Different people draw different words from me.

The task of a diplomat is to pursue the maximum interests for their country while avoiding unnecessary conflicts and frictions.

Democracy must be born anew every generation, and education is its midwife.

可持续发展不是成本中心，而是对我们未来的投资。

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.