The cold temperature will make it hard.

低温会让它变硬。

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Steig cautioned that the limitations of the data make it hard to predict future temperature changes in the region.

史代格提醒到，由于数据的局限性，使得这个地区将来的气温变化预测工作变得非常困难。

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And it's not hard to see how the heat of reaction at room temperature can be related to they heat of reaction at other temperatures.

知道室温下的反应热，如何与其他温度下的反应，热联系起来这点并不困难。

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Now, those hard tires will have a lower-temperature working range.

WSJ: Tire Trauma as Formula One Stars Feel Heat

It is hard to argue that anything above the Holocene maximum (of about 0.5 degrees above the pre-industrial temperature) can preserve a safe climate, and that we have already gone too far.

FORBES: Breaking News: The Climate Actually Changes!