要花好几十年的时间来逐步达到所需要的教育和发展水平。

It would take many decades to build up the level of education and sophistication required.

《柯林斯英汉双解大词典》

在过去十年里，年增长率达到7.5%以上。

Over the past decade annual growth has averaged 7.5%.

youdao

要在几十年间达到富裕的水平真的很难。

It will be really difficult for that to happen for many decades.

youdao

这仅仅是在人口达到五十亿后的十年。

This is just ten years after it reached five billion.

youdao

在过去十年，美国人口增长了9.7%，达到了3.09亿。

Over the past decade America's population has grown by 9.7%, to 309m.

youdao

它可达到25英尺高度在七至十年。

It can attain 25 feet in height in seven to ten years.

youdao

它可达到25英尺高度在七至十年。

It can attain 25 feet in height in seven to ten years.

youdao