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》

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》