A mainframe is a very large, very strong computer that many people can use at the same time. Banks, airlines, and governments still run their central records on them.

A mainframe is a very large, very strong computer that many people can use at the same timemainframe大型主機是一台非常大、非常強的電腦，可以讓很多人同時使用。Banks, airlines, and governments still run their central records on them銀行、航空公司和政府，到現在還是用它們來跑核心的紀錄系統。

It is not the tall box under a desk, even a powerful one, and it is not a laptop.

It is not the tall box under a desk它不是那種放在桌子底下的高機殼, even a powerful one即使是很強的那種也一樣, and it is not a laptop它也不是筆記型電腦。

The name comes from the big metal frame that used to hold the machine in a special cold room. Though actually, the machines today look different, but people kept the word.

The name comes from the big metal frame that used to hold the machine in a special cold room這個名字來自於一個很大的金屬框架，以前就是用它把機器固定在一間特別的低溫機房裡。Though actually不過其實, the machines today look different現在的機器長得已經不一樣了, but people kept the word但人們還是保留了這個詞。

Workers in computer rooms say it without smiling; to everyone else it sounds a bit old, like something from a film about the 1970s, which is fair — that is when they ruled — but they never really went away.

Workers in computer rooms say it without smiling機房裡的人講到這個詞時，是很嚴肅、不會笑的; to everyone else it sounds a bit old對其他人來說，這個詞聽起來有點過時, like something from a film about the 1970s好像是一部講1970年代的電影裡才會出現的東西, which is fair — that is when they ruled這樣講也算公平，因為那的確是它們稱霸的年代 — but they never really went away但它們其實從來沒有真正消失過。