Animals that maintain a constant body temperature year-round as true endotherms do grow rapidly even when the environment becomes cool.

真正的恒温动物可以一年四季保持恒定的体温，因此可以在天气很冷的情况下快速生长。

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The product should be packed well and stored up in the cool dry environment, avoiding straight sunshine, freezing and high temperature. (when season transforms, goods storage cannot too be many).

产品应包装好并储存在阴凉干燥环境，避免阳光照射、冷冻和高温。(季节转换时存货不可太多)。

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Through lots of experiments, the optimum contrast temperature difference between hot environment and cool environment is given.

并根据大量的实验给出冷热环境温差的优化值。

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