translation.en: And that leads to the second reason why the prediction didn't work, because scientists were also assuming that the telescopes they had were sensitive enough to detect the parallax.
translation.zh: 这也引出了另一个原因， 为什么这个预测不准确。 因为科学家也假定 他们的天文望远镜足够灵敏， 足以检测到这个视差。