the act of pressing something into a smaller space or putting pressure on it from different sides until it gets smaller

Tectonic forces caused compression in the earth’s crust. 大地构造作用力导致地壳被压缩。

Compression fractures of the spine are common in older people. 脊柱的压缩性骨折在年纪较大的人中很常见。

nerve compression 神经受压

the act of making something smaller or shorter so that it will fit into a particular space or time

the act of making a computer file use less space when it is stored, using special software

Advances in compression technology mean that you can now send even quite large files by email. 压缩技术的进步意味着，你现在甚至可以通过电子邮件发送相当大的文件。