这种材料在极低温下表现出超流性，能够无阻力地流过微小裂缝。

The material exhibits ___superfluidity at extremely low temperatures, flowing through tiny cracks without any resistance.

科学家利用超流体的特性来研究无摩擦的量子现象。

Scientists study frictionless quantum phenomena by utilizing the ___superfluidity property.