These three critical events, these clear threats to international security, have the potential to undo much hard-won progress in public health.

这三大危机，这些对国际安全的清晰可见的威胁，具有潜力颠覆公共卫生领域艰苦奋斗才取得的诸多成果。

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As may be clear later, the database doesn't actually have to write the do, Undo, and state records to its log just yet, although it might.

稍后就会清楚，实际上数据库也不需要马上把do、Undo、和状态记录写入它的日志，尽管可以这么做。

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It will take a titanium backbone, a strong political will, and a clear commitment to developing long-term economic development policies for leaders to undo the years of mismanagement of our cities and within their pension funds.

FORBES: Stockton, CA: One Of America's Most Miserable Cities Just Got More Miserable