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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.

该慈善机构向2000名年龄在9到15岁之间的儿童提问了有关两次世界大战的主要人物和重大事件的问题。

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