对于这种不寻常的现象，一个普遍的理论是，旅鼠没有意识到海洋是如此巨大的一片水域。

A common theory for this unusual phenomenon is that the lemmings do not realize that the ocean is such a huge body of water.

youdao

诸如璀璨的钻石或筑巢的鸟等现象都被归于数据的作用，成为形成或检验新理论的手段。

Such phenomena as a brilliant diamond or a nesting bird are relegated to the role of data, serving as the means for formulating or testing a new theory.

youdao

例如，物理学可以让你观察并理解世界，但也可以将观察到的现象整合成模型，提炼出理论或定律用以对未来做出预测。

For instance, physics allows you to observe and rationalise the world, but also to integrate observations into models and, sometimes, models into theories or laws that can be used to make predictions.

youdao

This is when you learn the laws in terms of which you can understand and explain a large number of phenomena.

从此刻开始,你们学习的理论,能帮助你理解和解释生活中的很多现象

耶鲁公开课 - 基础物理课程节选

There's different theories about why, but my point right now is simply that people don't necessarily know this but still they're subject to this.

有很多不同的理论对这种现象进行了解释，不过现在我的看法是,人们并不理解这种现象,但却仍然会这样去做。

耶鲁公开课 - 心理学导论课程节选

Because atomic theory explains things.

因为原子理论能够解释一些现象

耶鲁公开课 - 死亡课程节选