equipment不可数，当其表示个体时，要用名词或者量词来表数量概念，例如a piece of equipment一件设备、three pieces of equipment三件设备。equipment作名词的意思为设备、器材、配备、装备等，例如camping equipment野营装备、office equipment办公室设备等。

相关例句：1、The company has been investing in new plant and equipment.

这家公司一直在投资购置新机器和设备。

2、This piece of equipment is an exciting new development.

这台设备是一项振奋人心的最新研究成果。

3、The equipment is still at the experimental stage.

这种设备仍处于试验阶段。

4、The new system interfaces with existing telephone equipment.

新系统与现有的电话设备相连接。

5、The equipment is slow and heavy by modern standards.

按现代标准，那台设备又慢又笨重。