No matter what methods you choose, you should know that effective learning takes time and effort.

不管你选择什么方法，你应该知道有效的学习需要时间和努力。

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While classroom time alone doesn't produce a well-educated child, learning takes time and more learning takes more time.

虽然课堂时间本身并不能培养出一个有教养的孩子，但是学习需要时间，而更多的学习需要更充足的时间。

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To acquire learning takes time.

获取学识需要花费时间。

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And this was more evidence that they just don't understand objects, and that this thing takes a lot of time and learning to develop.

这更证明了 他们并不理解客体的概念,而这种概念需要通过大量的时间学习,才能够掌握

耶鲁公开课 - 心理学导论课程节选

The challenges that... First of all, you got to understand that learning a language takes time.

挑战就是，首先，你必须明白学习一门语言是件耗时间的事。

学第二外语的时候 - SpeakingMax英语口语达人

But learning takes time and concentration, so now we get to claim peace and quiet as we drink wine and set up our mise en place, just like the guy on that cooking show and, if you think about it, just like our own fathers, back when they tinkered in the workshop or stopped by the corner pub on the way home.

WSJ: A Real Man's Place Is in the Kitchen by Daniel Duane

It takes time for the learning curve to set in and for advances to turn into routine practices.

FORBES: Fact and Comment

Watson is also based on machine learning and to master a subject, it takes a significant amount of time and data.

FORBES: IBM's Watson On Smartphones Will Lead To Business Analytics Unchained