fifties
n.五十多岁；（气温）五十多度；（尤指二十世纪）五十年代
例句
She was born in the fifties.
她是五十年代出生的。
《牛津词典》
I probably look as if I'm in my fifties rather than my seventies.
我可能看起来像五十多岁，而不像七十多岁。
《柯林斯英汉双解大词典》
He retired in his fifties.
他在五十多岁时退休了。
