The ages of rocks between these two were little more than guesswork.

在这两者之间的地层年代基本都是靠猜测。

youdao

The charity questioned 2,000 children between the ages of nine and 15 about their knowledge of the key people and events of the two wars.

该慈善组织对两千名年龄在9至15岁间的儿童进行了调查，调查内容涉及两次世界大战的关键人物和重要事件。

youdao

Yet most girls were apparently losing their virginity younger - between the ages of 17 and 20, a full two years earlier than the generation of the Fifties.

然而，显然大多数女孩子在更年轻的时候失去童贞，这个年纪一般在17到20岁之间，这比50年代时要早了整整两年。

youdao

His team found that levels of stress were highest among adults between the ages of twenty-two and twenty-five.

VOA: special.2010.08.03

More than two thousand people between the ages of forty-five and eighty took part in the study.

VOA: special.2009.04.08

They looked at data on 31,000 children between the ages of two and 18.

VOA: standard.2010.03.09

Mr. Burton's treatise, like the man himself, rests between two ages one in which the authority of Scripture reigned supreme, and a newer era acknowledging the power of deductive reasoning to sort out life's great questions.

WSJ: Robert Burton | The Anatomy of Melancholy | Digressions on a Diagnosis | Masterpiece by Danny Heitman

The investigators point out that the rate of gain between the two groups between ages 2 and 4 were not significantly different, making it less likely that skim milk was a cause of increased weight gain.

CNN: Drinking skim milk may not lower child obesity risk

In another experiment, the team repeated the test with 20 children between the ages of two and seven.

BBC: Sharing: Chimp study reveals origins of human fair play