60年代是摇滚乐和嬉皮士文化蓬勃发展的时期。

The ___60s were a time when rock music and hippie culture flourished.

他在60多岁时开始学习弹钢琴。

He started learning to play the piano in his ___60s.

今天的气温在60华氏度左右，非常适合户外活动。

The temperature is in the ___60s today, perfect for outdoor activities.