These include Afghanistan, Angola, Congo and Nigeria, which Dr Hill suggests produce health data that are, at best, inconclusive.

这些国家包括阿富汗，安哥拉，刚果和尼日利亚，这样得出的数据是完全无效的。

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That failure has condemned us to the prosecution of open-ended and, at best, inconclusive military operations in Afghanistan and Iraq, uninformed by any understanding of what actually animates our enemies.

CENTERFORSECURITYPOLICY: The speech we need

While it's unclear exactly what the two leaders said about this frightening topic, chances are the discussions were, at best, inconclusive on the subject of Moscow's noncompliance with its existing chemical arms-control obligations.

CENTERFORSECURITYPOLICY: A Noxious Arms Control Treaty