"A good book is a magic gateway into a wider world of wonder, of joy, of meaning."
Probability is determined both by the nature of our observations and by our conception of rationality.
Sustainability is the future of quarrying, and we must act now.
一个国家的力量不仅仅是其强制能力,还包括其提供服务的能力以及在公民眼中保持合法性的能力。