压缩边界

例句：

1. 1. The engineer used a hydraulic ram to compress the metal sheet.
   工程师使用液压千斤顶来压缩金属板材。
2. 2. The company is compressing its workforce to improve efficiency.
   该公司正在压缩其劳动力以提高效率。
3. 3.The airbag compresses when the car hits a bump.
   汽车在颠簸时，气囊会压缩。