How long did it take Darrius to learn to play River Flows in You?

达瑞斯花了多长时间才学会弹奏《你的心河》？

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Inside you will learn how to jumpstart your way into a lifestyle of balanced eating that promotes long term health.

在书里面你会学到如何重新开始新的关于促进长期健康的平衡膳食的生活方式。

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In this phase, you also learn how to set a goal weight and how to develop long-term healthy-eating patterns.

在这期间，你也会学到如何设定目标体重，以及如何形成长久的健康进食习惯。

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It would be easy to answer this question if you could see into the future to learn how long you will live, your health status for the rest of your life and how the economy and inflation will behave during your retirement.

FORBES: Weave Your Own Retirement Safety Net

Do you know how long it took me to learn that?

FORBES: Spending Lessons I Learned From My Childhood

More impressive is the e-reader's ability to learn your reading speed and give you information on how long it will take you to finish a chapter, or the entire book.

CNN: Review: Kindle Paperwhite is king of the e-readers