名詞 main frame:

1. a large digital computer serving 100-400 users and occupying a special air-conditioned room
   同義詞：mainframe, mainframe computer
2. (computer science) the part of a computer (a microprocessor chip) that does most of the data processing
   同義詞：central processing unit, CPU, C.P.U., central processor, processor, mainframe

1. In appearance, a microcomputer has three simple and apparent parts: the main frame, the keyboard and the monitor.
   從外表上看，微型計算機有簡單而鮮明的三部分：主機、鍵盤和監(jiān)視器。