compressions 是 compression 的复数compressionKK [kəmˋprɛʃən] /kəmˈpɹɛʃən/发音名词1压缩、挤压The compression of the metal parts changed their shape permanently.金属零件受到压缩后,形状永久改变了。2压缩电脑Image compression reduces the file size without much loss of quality.影像压缩可以缩小档案大小,而画质不会损失太多。3按压医学,常用复数Start chest compressions immediately and keep a steady rhythm.立刻开始胸部按压,并保持稳定的节奏。4压迫医学Compression of the nerve was causing numbness in her left hand.神经受到压迫,导致她左手发麻。5压缩机械The engine has lost compression in one of its cylinders.引擎有一个汽缸失去压缩力了。用这个字练口说→