seventy /ˈsevnti/ I. num. 七十，七十个 (人或物)：About seventy people attended.大约70人出席。My teacher is a seventy-year-old woman.我的老师是一位70岁的老妇人。‖II. n.1.( pl.)年代：in the seventies (或in the 70’s) 七十年代 2.( pl.)七十到七十九岁: in one’s seventies 在某人七十多岁时
seventieth num.第七十个
