Literature is the memory of humanity.
文学是人类的记忆。
Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.
Simple, sincere people seldom speak much of their piety; it shows itself in acts rather than words, and has more influence than homilies or protestations.
自然和历史是地理知识的两个重要来源。
乳制品行业必须发展以满足消费者需求和环境责任。
I don't want to be a part of a world where being kind is a weakness.