In one year I can write about twenty letters to my mother.
在一年里我能给母亲写大约二十封信。
He spent about twenty-one hours in space. He did a lot of work there.
他在太空中度过了大约二十一个小时。在那儿他做了很多工作。
Wheat prices have risen one hundred twenty percent in the past year.
小麦价格在去年上涨了120%。
We can remain in the postures anywhere from one to twenty minutes!
我们可以在一个体式保持从一分钟到二十分钟的任意时间！
Slowly the line moved up and, one by one, passed in, until twenty-five were counted.
队伍慢慢地向前移动，一个接着一个地走了进去，直到数到了二十五个。
One child in twenty has this disease.
二十个小孩中有一个患有这种疾病。
I can't read twenty pages in one hour.
我一小时内读不了二十页。
I still remember that moment. There was only twenty-one dollars left in my bank account.
我仍然记得那时候，银行存款里只剩二十一圆。
And Father was embarked in one of his own warships within twenty minutes.
父亲在二十分钟之内便跳上了他的一艘战舰。
She bought twenty books in one day.
她一天买了二十本书。
There are twenty-four lessons in Book One.
第一册有二十四课。
Worse, he'll tell ten, twenty, one hundred people about it, and they will in turn tell others.
而且，更糟的是，受骗者会告诉十个、二十个、一百个人，而他们又会告诉其他人。
I was twenty-one that day, in the golden age of my life.
那一天我二十一岁，在我一生的黄金时代。
Stanford was one of twenty-one American universities that took part in the contest this year.
斯坦福大学是今年参加这次竞赛的21所美国大学中的一所。
There are twenty-one boys in my class.
你们班的男生在哪里?。
Hairdresser: It's one hundred and twenty dollars in all.
美发师：总共是一百廿块钱。
Although the son was but twenty-one, he had already served a term in jail.
儿子虽然才21岁，但已经在狱中服刑有些年了。
In his twenty , he was one of famous basketball players in his university .
他在20多岁时是他们大学有名的篮球运动员。
There are twenty-four boys in the class. One of them is English.
在班里有24名男孩，其中之一是个英国男孩。
There are twenty-four boys in the class. One of them is English.
在班里有24名男孩，其中之一是个英国男孩。
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