The essence of quantum mechanics is that it provides a mathematical framework for the description of the behavior of atomic and subatomic particles.
量子力学的本质在于它提供了一个数学框架，用于描述原子和亚原子粒子的行为。
The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.
The key is to stay humble and hungry.