This fact is so important that it has a name: The Heisenberg uncertainty principle.

海森堡测不准原理。

That although it's a particle, because of the Heisenberg uncertainty principle, we can never tell exactly at a given moment where the particle is and what its momentum is.

尽管它是一个粒子，但由于海森堡不确定性原理，我们永远无法在给定时刻准确地判断粒子在哪里以及它的动量是多少。