The moment you recognize what is beautiful in this world, you stop being a slave.
推动煤炭工业高质量发展,必须依靠科技创新和智能化升级。
在量子力学中,观察者与被观察的系统并不是分离的。
The idea that a bell rings to signal when investors should get into or out of the stock market is simply not credible.