seventies
noun [ plural ] uk/ˈsev.ən.tiz/ us/ˈsev.ən.t̬iz/
七十多岁（指70到79岁的时期）
A person's seventies are the period in which they are aged between 70 and 79
He's very active considering he's in his seventies. 鉴于他都70多岁了，他已经算是非常有活力的了。
the seventies 七十多度（指70到79华氏度之间）
the range of temperature between 70° and 79°
The temperature is expected to reach the seventies tomorrow. 明天的温度预计会达到70多华氏度。