她在20世纪的三四十年代成为一位名导演。

She became quite a notable director in the thirties and forties.

《柯林斯英汉双解大词典》

他经常与三四十个粉丝在飞跳比赛前举行车尾野餐会。

He routinely holds tailgate parties at Flyers games with 30 or 40 fans.

《柯林斯英汉双解大词典》

这种病多发于三四十岁女性的身上，不过我见过很多更年轻的女性也患了此症。

It is most often diagnosed in women in their thirties and forties, although I've seen it in many younger women, as well.

《柯林斯英汉双解大词典》

By the 1830s,1840s, there were over 100 men in Charleston, South Carolina alone, making their livings full-time as slave traders.

到了十九世纪三四十年代,仅仅在南卡罗来纳的查尔斯顿地区,就有超过一百个,专职从事奴隶贸易的奴隶交易商

耶鲁公开课 - 美国内战与重建课程节选

on the U.S. president Franklin Delano Roosevelt from the 30's and 40's.

我们介绍的在三四十年代的美国总统罗斯福。

要做好角色分担 - SpeakingMax英语口语达人

So in fact, over the next thirty or forty minutes we're going to show you a set of examples of sort of canonical algorithms, and the different classes of complexity.

在接下来的三四十分钟里面,我们将要讲一系列的,权威算法，以及不同种类的复杂度问题。

麻省理工公开课 - 计算机科学及编程导论课程节选