A compressor is a machine or part of a machine that squeezes gas or air and makes it take up less space. 压缩机
noun [专属名词]压缩机;压缩物;收缩肌;[医] 压迫器
The Soviet scientist made his experiments with a bad light, on wooden tables, using an old vacuum cleaner instead of a compressor. 这位苏联科学家在木桌上,借着糟糕的灯光做实验,用的是旧吸尘器而不是压缩机。