Seventy million years after the great melt, 大融化7000万年之后
Seventy percent of the world's population lives on coastal plains. 世界上70%的人口居住在滨海平原
Seventy percent of this gas, 没有氧气我们的非就不能呼吸
another seventy times 重复70次
and temperatures drop to minus seventy degrees centigrade. 气温下降到零下70℃