/ˌdi:kəmˈpreʃn ||; ˌdikəmˈprɛʃən/noun [U]:
1 a reduction in air pressure 减压状态: decompression sickness (= the problems that people experience when they come up to the surface after swimming very deep in the sea) 减压病（人潜入深海以后返回水面时所经历的问题）
2 the act of reducing the pressure of the air 减压；卸压
3 (technical术语) the process of allowing sth that has been made smaller to fill the space that it originally needed 解压缩