他请了一周假,现在正忙着补上落下的工作进度。

He took a week off and is now busy catching up with his work.

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He took a week off and is now busy catching up with his work.

catching up 是动词短语 catch up 的现在分词形式。catch 意思是"抓住",up 表示"向上、赶上"。 catch up 字面意思是"抓住赶上",引申为"赶上进度、补上工作"的意思。

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