The true cost of oil isn't just the price per barrel—it's the environmental and social impact.
复杂性理论告诉我们,并非所有问题都是平等的;有些问题本质上比其他问题更难。
"Writing is not just a profession; it's a way of life, a means to explore the depths of human existence."
In the realm of psychology, the line between normal and abnormal is often blurred and subjective.