他最近发布了一张新 CD,他花了很多时间和精力。

He has recently released a new CD on which he spent a lot of time and effort.

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He has recently released a new CD on which he spent a lot of time and effort.

released 是动词 release 的过去分词形式,release 的意思是"发布、发行",指将音乐、电影等作品正式向公众推出。

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