夸克是构成质子和中子的基本粒子。

___Quarks are the basic particles that make up protons and neutrons.

科学家们仍在研究夸克的性质及其在原子核内的相互作用。

Scientists are still studying the properties of ___quarks and their interactions within atomic nuclei.

在粒子物理学中，存在六种不同类型的夸克。

In particle physics, there are six different types of ___quarks.