The concept of a particle is only an approximation, valid in certain limiting cases.
粒子的概念只是一种近似，仅在特定极限情况下有效。
真相是，过去是我们所拥有的一切。我们无法改变它，但我们可以从中学习。
The strongest is never strong enough to be always the master unless he transforms strength into right and obedience into duty.
The best strategy is simple but not easy.
可持续性不是终点，而是日常实践。
I don't count my sit-ups. I only start counting when it starts hurting.