warn could be used to indicate situations where something retryable has failed; for instance, it could warn that a connection was not established the first time and that the system was trying again

warn可用于表示某些可重试的事情已失败的情形；例如，它可以警告某个连接在第一次尝试时没有成功建立，并且系统将再次尝试。

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And polls show a similar result may be produced again this time, although European leaders warn deviating from the cost-cutting path could lead Greece out of the euro.

BBC: Journey across crisis-hit Greece