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of primary importance

头等重要的

1、首要的

... first one..., then the other...先是一个，然后另一个… of primary importance首要的 once every week (month, year)每周（月，年）一次 ...

2、头等重要的

头等重要的(of primary importance), 此释义来源于网络辞典。

a matter of primary importance头等重要的事情

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