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1·He's in his early twenties.

他二十出头。《牛津词典》

2·He started going bald in his twenties.

他二十几岁便开始谢顶。《牛津词典》

3·They're both in their twenties and both married with children of their own.

他们俩都二十几岁了，都已结婚有了自己的孩子。《柯林斯英汉双解大词典》

4·Mozart clearly enjoyed good health throughout his twenties and early thirties.

莫扎特显然在二十几岁和三十刚出头时身体很好。《柯林斯英汉双解大词典》

5·She'd had to wear her short, auburn hair flat like a twenties flapper for the play.

为了该话剧，她需要像二十年代年轻女郎一样将短褐色头发弄直。《柯林斯英汉双解大词典》

6·In his twenties Roosevelt had sought work as a cowboy on a ranch in the Dakota Territory.

二十多岁时，罗斯福曾经到达科他地区的一个大牧场去找牧牛工的活儿。《柯林斯英汉双解大词典》

7·A high proportion of crime in any country is perpetrated by young males in their teens and twenties.

在任何国家，很大比例的罪行都是十几岁和二十几岁的青年男子所为。《柯林斯英汉双解大词典》

8·Inside were three men, aged in their early twenties.

车里有三个男人，都是二十刚出头年纪。

9·I was in my twenties and everything was being renewed.

当时的我二十多岁，一切都在复兴。

10·When Peter was in his twenties, he would go to that bar to drink wine with his good friends after work.

在彼得二十多岁的时候，他下班后会和好朋友去那家酒吧喝酒。

(1)twenty five二十五

(1)twenty first第二十一