We're talking decades of work.

我们在谈论的是数十年的工作。

youdao

Spotted owls are on the decline despite two decades of work to bring them back.

尽管在过去二十年里，人们为了保护斑点猫头鹰做了很多工作，但斑点猫头鹰的数量仍然处于下降趋势。

youdao

Despite decades of work by health campaigners, more than one billion people still smoke today.

虽然反吸烟行为倡导者在过去的几十年里一直在努力，但是今天仍然有超过10亿的烟民。

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"It has collapsed because of the conscious work of new generation of opposition inside which worked for two decades on building up an alternative system of information, knowing that's the most important,".

VOA: standard.2009.11.03

Decades of work by Rotary International and, more recently, by Bill Gates, will be for nothing.

FORBES: More Polio Workers Killed

After decades of work in radio, music and popular culture, I should have known better.

FORBES: Tribune's Lee Abrams Defends Himself: "I Will Not Stop Pushing"

And that is more than can be said for three decades of work by other physicists.

ECONOMIST: A shape could describe the cosmos and all it contains