1、 Business decisions are often made with many unknow and unknowable factors, which would even puzzle the best poker players.
商业决策通常是由许多未知和不可知的因素做出来的，这些因素甚至会让最优秀的扑克玩家感到困惑。
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2、 The specific impact of the greenhouse effect is unknowable.
温室效应的具体影响尚不可知。
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