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

聚合金刚石纳米棒，或超级金刚石，更酷的是，这些是我们所知的坚硬、高，几乎无法压缩的材。

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，金属泡沫对高科技震动和压力吸收的帮助很大，内部气体让物质极压缩，可吸收很多机械能，而且依然保留金属的强和耐用性。