A unit bearing circuit components which can be plugged into a piece of equipment. 一种装有电路元件的插件板，可将它插入设备中。
One continuing trend in computer development is microminiaturization, the effort to compress more circuit elements into smaller and smaller chip space. 计算机发展的一个持续不断的趋势是微小型化，亦即将更多的电路元件压缩在越来越小的芯片空间上的努力。
