translation.en: And so if you think about it, the depressing thing is that Facebook would never make a change to something with a sample size as small as a Phase III clinical trial.
translation.zh: 想想看，Facebook用于改进广告投放算法 能够获得的样本大小都比 一个三期临床实验的样本大得多 这真叫人觉得沮丧