The concept of a black hole firewall challenges our understanding of quantum mechanics and general relativity.
The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.
过去总是紧张的,而未来是完美的。
The future of medicine lies in understanding the smallest details.
Seek the best tranquil condition for the soul.