操作系统被升级到了最新版本。

The operating system was upgraded to the latest version.

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The operating system was upgraded to the latest version.

upgraded 是动词 upgrade 的过去分词形式,在句中表示被动。upgrade 由前缀 up-(表示"向上")和 grade(等级)组成,意思是"提升等级、升级"。upgraded 表示"被升级的"。

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