I think frugality drives innovation， just like other constraints do. One of the only ways to get out of a tight box is to invent your way out.

Thank you music for making my life so wonderful.

儿童不是知识的被动接受者，而是学习过程的积极参与者。

腐朽的木头无法雕刻。

数学研究是一场没有终点的旅程。

Facing challenges requires courage to overcome difficulties and turn crises into development opportunities.

La literatura es una forma de resistencia, una manera de decir no a la realidad que nos imponen.

The legislative cannot transfer the power of making laws to any other hands: for it being but a delegated power from the people, they who have it cannot pass it over to others.