The climate system is extraordinarily complex, and our understanding of it is still evolving.
气候系统异常复杂,我们对它的理解仍在不断发展。
我写作是为了理解自己的生活。
法律体系的概念预设了规则的概念。
数据库是所有应用程序的基础。
It's so much darker when a light goes out than it would have been if it had never shone.