These models are not perfect, and struggle to simulate some features of the climate system such as clouds.

这些模型并不完美，勉强能模拟气候系统的部分特征，例如云层。

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"Many models of climate change's effects on the growing season don't deal with the internal climate-control system by which plants respond to seasonal temperature changes," says Lechowicz.

“有些对气候变化的做的模拟，其效果只体现在了植物的生长期上，并未针对其内部的气候控制系统。这个系统可以让植物对季节温度的变化有所反应。”Lechowicz说。

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The new early-warning system brings this approach right up to date, by integrating many different climate-forecasting computer models that couple together information about how the atmosphere and the oceans combine to create the weather.

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