Large and important projects such as this one often take years to develop.

大型的重要项目需要花好几年开发，比如说这个。

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"We've only had this technology around for about fifteen years, and most carcinogens will take about several decades, thirty-forty years to develop a cancer.

VOA: special.2011.06.06

He is working to develop disease-resistant plants, but he says it will probably take five years.

VOA: special.2010.06.08

Sometimes they take months to develop inside the seedpods.

VOA: special.2010.04.06

In Kenya, AMI is helping media houses develop strategies to take advantage of new business opportunities made possible by data-driven journalism.

FORBES: Up for Debate: How Mobile Media is Transforming Africa for Good

But we can develop a strategy to take control of our energy future and avoid gas spike prices down the line.

WHITEHOUSE: By the Numbers: $4 Billion

"It's a whole new skill set to develop: to convince people to actually take out their credit card, even for one cent, " said Robert Kyncl, YouTube's vice president and global head of content partnerships, told reporters at the March event.

NPR: YouTube Said Set To Soon Launch Pay Channels