在数学中，提出问题的艺术必须比解决问题更有价值。

The true teacher defends his pupils against his own personal influence.

The best aquaculture practices are those that future generations won't have to undo.

The most painful state of being is remembering the future, particularly the one you'll never have.

我唱的每一首歌都是我献给世界的一片真心。