The interval may be assumed to have been a major formative period in his life: he was 21 years old when it began, 31 when it concluded.

但是这段时间可以被认为是一个人的成形时间(formative period)：开始于他21岁，终止于他31岁那年。

youdao

Larger by a semitone than the corresponding major or perfect interval.

比相应的大音程或完全音程增多一个。半音。的。

youdao

This paper presents a reverse cement squeezing technique which sets the liner in the non major buried hill reservoir and then cements the liner utilizing the lost circulation in buried hill interval.

文中介绍了将尾管坐入潜山非主力油层，再利用潜山地层漏失进行反挤水泥固井。

youdao

However the hours before the drama either side of the tea interval will be best forgotten by the tourists, with poor catching a major factor in the hosts' comfortable progress.

BBC: News | Cricket | Saqlain stars in Aussie collapse