严格地说,这里所讨论的压力(最高20000大气压)并够不上目前“超高压”的定义。然而,鉴于低温与高压的同时获得具有特殊意义和困难,因而觉得应将这部份材料包括在内。将低温下可获得的压力范围扩展到超高压区域是很有意义的。这在目前尚未能实现,而且看来是很困难的。 Strictly speaking, the pressure discussed here (up to 20,000 atmospheres) does not match the current definition of “hyperbaric”. However, given the special significance and difficulties of simultaneous acquisition of low temperature and high pressure, it was felt that this part of the material should be included. It makes sense to extend the pressure range available at low temperatures to the extra high pressure region. This has not been achieved yet and it seems very difficult.