Reality: Testing is not the time-consuming activity in a development lifecycle.

事实：测试在开发周期中不是耗时的活动。

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Traditionally, the manufacturing process for these wings is time-consuming and a case of trial and error.

传统上，这些翅翼的制造过程相当费时，需要不断地出错重试。

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It's just very time consuming to get such a large quantity of data.

要收集这么多的数据就是非常耗时。

《柯林斯英汉双解大词典》

Building models is so time-consuming that a company with a head start in the business has a good chance of defending its position for years.

ECONOMIST: Three-dimensional imaging

"That meant rebuilding them from scratch" -- a time-consuming effort.

CNN: Computer virus hits U.S. drone fleet

But for those who fly for themselves, or who might be interested in giving it a try, these advances could make it much safer, easier, and less time-consuming to be a pilot in the near future.

FORBES: Will Your Next Airplane Be A Drone?