证明是一种用于使他人相信数学陈述为真的工具。

Effective leaders know how to listen to others' opinions and learn from them.

The future of physics lies in the unification of quantum mechanics and general relativity.

I like to work with actors who are not afraid to take risks.

I do not know what I may appear to the world， but to myself I seem to have been only like a boy playing on the sea-shore， and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary， whilst the great ocean of truth lay all undiscovered before me.