For paper manufacturers who run on fixed capacity, it's hard to increase production quickly.

而对于以固定生产力运行的造纸商来说，他们很难快速提高产量。

She shows the importance of a growth mindset, or the belief that you can always improve as opposed to the belief that you have a fixed capacity to achieve.

她展示了成长心态的重要性， 或者相信你总是可以进步的信念， 而不是相信你有固定的能力去实现的信念。