For example, the Maya civilization developed a writing system, built huge pyramids, had a complex calendar, and developed the concept of zero 500 years before anyone in the Old World.
例如，玛雅文明发展出书写系统，建造了庞大的金字塔，创造了复杂的历法，并比旧世界的文明早500年发展出“零”这一概念。