当温度接近绝对零度时，某些液体会转变为超流体，能够毫无阻力地爬出容器。

At temperatures near absolute zero, certain liquids transform into ___superfluid and can climb out of containers without any resistance.

当温度接近绝对零度时，氦-4会表现出超流体特性，能够无阻力地流动。

When cooled near absolute zero, helium-4 becomes ___superfluid and can flow without any friction.