However it may have disadvantage in the process, so we need further study to improve it.

然而，在实施过程中存在不足，有待于我们进一步研究。

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The take-home message of this study is really that we need to do further research to look at this link between flu and heart attack to see whether there's a real cause and effect here.

这项研究的核心讯息是，我们还需更多的研究来判断流感与心脏病之间是否存在确实的因果关系。

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