如果仅仅是季节性运行，则在寒冷环境下开启测试旋塞。
Open test cocks to drain in cold climates if only operated seasonally.
但是，在某些条件下，如模仿一个寒冷环境，这些母体细胞可被诱变，从而产生较多棕色脂肪。
But under certain conditions, such as those mimicking a cold environment, these progenitor cells can be induced to make more brown fat.
因此猛犸象通过“改善”血红蛋白使它可以在低温下更容易释放氧气来适应自己身处的寒冷环境。
So mammoths solved that problem by evolving hemoglobin that releases oxygen more easily in the cold.
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