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重点讲解：
1.find out 找出；查明
They find out your strengths and limitations and work with them to improve yourself.
他们找出你的实力和局限，解决问题并且提高你自己的实力。
2.take up 拿起；占据
Then, we plot the different graphs so that they each take up one fourth of the screen.
然后，我们绘制不同的曲线图，从而它们可以每个图占据屏幕的四分之一。
