The mining industry is cyclical, but great companies are built by those who can navigate the downturns as well as the booms.
科学最重要的意义在于它为我们提供了一种方法,可以提出能够明确回答的问题。
无论是个人还是国家,只要生活节俭,就会繁荣昌盛;如果贪图享受,放纵欲望,那就会走向衰亡。