对待心中的欲念，放纵即有所损，所以关键在于忍；改过向善，努力即有所助益，所以关键在于悔。

Education is one of the most powerful tools we have for reducing inequality and promoting social mobility.

"The best way to predict the future is to create it."

The language of mathematics is universal, transcending cultural and linguistic barriers.

史记

地球及其周围的水域实际上必须具有其阴影所揭示的形状，因为它以完美的圆弧遮蔽了月亮。