量子引力问题不仅是物理学的问题，也是科学哲学的问题。

The past is a story we tell ourselves.

Climate change poses the greatest threat to marine life, and we must act now to mitigate its effects.

If you love life, don’t waste time, for time is what life is made up of.

The true poet is a man who is always in love with life.

存在与时间相互归属。