noun 下载 🔗分享 天文数字, 极大的数字 Any very large number, exceeding normal description. Examples : "The national debt has risen to quadrillions of dollars, a number so vast it's hard to even imagine. " 国家债务已经上升到数万亿美元,这是一个天文数字,大到难以想象。 number math amount 与AI对话词汇游戏阅读练习