But studies show that's a separate factor, in other words, people slow down their reading even if their vision is fine.

但研究表明，还会有一个单独的因素，换句话说，即使视力良好，人们也会放慢阅读速度。

We must separate out these different factors and examine each one.

【separate】我们必须把这些不同的因素整理出来逐个进行研究。

There are entirely separate factors  relevant to human experience beyond the actual feeling of experiences.

除了实际的经历感受之外，还有完全独立的因素与人类经验相关。

There are not two separate factors affecting the rate of investment, namely, the schedule of the marginal efficiency of capital and the state of confidence.

影响投资率的因素并不是两个独立的因素，即资本边际效率曲线和信心状态。