Most liquids are less dense and more compressible than their corresponding solids, but only slightly so.

与相应的固体相比，大多数液体的密度较低且压缩性更高，但仅略微如此。

Aggregated diamond nanorods, or hyperdiamonds, if you wanna sound cool, these are the hardest, most dense, and least compressible material we know of.

聚合石纳米棒，或超石，更酷的是，这些是我们所知的最坚硬、密度最高，几乎无法压缩的料。

And all of that is just for the case of incompressible fluid flow, where something compressible, like air, makes things trickier still.

所有这些都只是针对不压缩流体流动的情况，压缩的东西（例如空气）使事情变得更加棘手。

(shot fires) As you can see, there isn't much effect on land, because air is compressible, which helps dissipate energy, plus the blast wave reflects around objects.

(射击火焰) 如你所见， 在陆地上效果并不显著，因为空气压缩， 有助于分散能量，此外，冲击波会在物体周围反射。

In general, metal foams are useful for high-tech shock and impact absorbers, the gas inside makes them extremely compressible, so they can absorb a lot of mechanical energy, while still retaining some of the strength and durability of a metal.

总之，属泡沫对高科技震动和压力吸收的帮助很大，内部气体让物质极度压缩，吸收很多机械能，而且依然保留属的强度和耐用性。