We all know studying English is hard, and it takes years, if not decades, to master it.

我们都知道学英语很难，要学几年甚至几十年才能掌握。

youdao

"Think centuries or millennia, not decades," said Dr. Dyson, who also said he approved of the Planetary Society project.

“想想几百年或几千年后，而不是几十年，”戴森博士说，他说他认为行星协会的项目是可行的。

youdao

African countries frequently have to wait years, if not decades, for new medical products to trickle into their health systems.

非洲国家经常必须等上数年，如果不是数十年的话，才能使新型医疗产品慢慢进入其卫生系统。

youdao

African countries frequently have to wait for years, if not decades,for new medical products to trickle into their health systems.

VOA: special.2011.01.19

The subprime mortgage market was bringing people into the mortgage market who in prior decades would not have been involved-- would not have had any mortgage.

次贷抵押信贷市场,把十多年前那些,不能获得抵押贷款的人,带进了抵押信贷市场

耶鲁公开课 - 金融市场课程节选

But we still need to govern. To Democrats, I would remind you that we still have the largest majority in decades, and the people expect us to solve problems, not run for the hills."

VOA: special.2010.01.30

Commercially manufacturing this kind of nano-hardware data storage still remains years, if not decades, away.

FORBES: Magazine Article

They play out over years (if not decades) and are structural in nature and not merely cyclical recessions.

FORBES: Ugly Choices Ahead For Central Bankers: Will The Yen Drop 50%?

The goal is to produce a gigawatt of energy in years, not decades.

FORBES: Magazine Article