This has been the hardest item for me to do consistently over my working years.

工作这些年来，对我而言这是最难坚持做到的一条。

youdao

Today when you reach 50 you can realistically expect to look forward to as many working years ahead as you have behind you.

今天当你到50岁的时候，你真切的希望未来有足够长还能够像你前五十年那样投入工作。

youdao

If you are young and have many working years ahead of you, your human capital is high, and you can take more financial risk.

如果你很年轻，还能工作许多年，那么你的人力资本很高，可以冒更多的金融风险。

youdao

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

And scientists have been working on this for years and there's been progress, but it's still a very difficult challenge.

科学家们对此已经研究很久了,并取得了进展,但仍有很大挑战

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The longest piece that I have been working on has been developed over the last three years.

我一直在写的一个最长的剧本已经写了三年了。

灵感从何处来 - SpeakingMax英语口语达人

During their working years, men now have more leisure time than in the past.

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Self-made, he spent his childhood in an orphanage and his early working years on a factory floor.

FORBES: The son also rises

Such policies impose higher implicit marginal tax rates on people who save and invest during their working years.

FORBES: The Cato Institute Responds to President Obama's State-of-the-Union Address