It has to be part of a theory, and then trying to adjust it so it can be incorporated, you discover anti-particles.

要想使理论合理,然后试着去调整,使之和实际相符,结果就找到了反粒子

耶鲁公开课 - 基础物理课程节选

Piaget had a rich theoretical framework, pulling together all sorts of observations in different ways, wrote many, many books and articles and articulated his theory very richly.

通过将各种观察结果,以不同的方式组合在一起,皮亚杰的理论内容变得十分丰富,他写了大量的书籍和论文,丰富了他的理论

耶鲁公开课 - 心理学导论课程节选

They might say my sample period was off, ... but that's what the theory-- ... using my data for the sample period that I computed-- the expected returns and co-variances says one should do.

他们可能说我的采样周期是有问题的，不过我的结果都是靠理论-,我采用自己收集的数据计算出-,预期收益和协方差可以用来指导我们的投资行为。

耶鲁公开课 - 金融市场课程节选