Wty are politicians no longer concerned with snowball fights?

为什么政客不再以雪球打架关心？

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The results of analysis show that wty the silicon separatas out as a preliminary phase, and why the Al-Si alloys have their own pseudoeutectic structures are all for thermodynamical reasons.

分析结果表明，共晶结晶时硅之所以成为先析出相，铝硅合金之所以存在伪共晶，都有其热力学原因。

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