"旧电脑" 英文翻译为 "an old computer".
来源： "computer" 是英语中早期电子计算机的称呼，而 "old" 是表示过去时间或已经过时的物品的形容词。
例句 1: "I need to upgrade my old computer because it's too slow." (我需要更新我的旧电脑，因为它太慢了。)
例句 2: "My old computer is not compatible with the new software." (我的旧电脑与新软件不兼容。)
例句 3: "I can't bepeve I've had this old computer for five years now." (我不敢相信我已经用了这台旧电脑五年了。)