Our current understanding of the natural world on the quantum level breaks down at what's known as the Planck scale.

我们目前对量子水平自然界的理解不适用于普朗克尺度。

There's still a wide range of things that are smaller than what's currently observable but larger than the Planck scale to investigate.

仍然有大量的比我们目前能观察到的小，但大于普朗克尺度的东西需要我们去探究。