n.外温动物，冷血动物；变温动物

Ectotherms, such as reptiles and fish, rely on external sources to regulate their body temperature.
冷血动物如爬行动物和鱼类依靠外部来源来调节它们的体温。
The performance of an ectotherm is greatly influenced by the ambient temperature.
冷血动物的性能受到环境温度的极大影响。
In cold climates, ectothermic animals often hibernate or estivate to avoid extreme temperatures.
在寒冷气候中，冷血动物经常冬眠或夏眠以避免极端温度。
Many ectotherms have evolved mechanisms to cope with fluctuating environmental conditions.
许多冷血动物已经进化出应对不断变化的环境条件的机制。
Ectotherms can be more active in warmer environments, leading to higher metabolic rates.
冷血动物在温暖的环境中可以更活跃，从而导致更高的代谢率。
Unlike endotherms, ectotherms do not expend energy to maintain a constant body temperature.
与恒温动物不同，冷血动物不会消耗能量来维持恒定的体温。
The activity patterns of ectotherms are closely tied to the availability of sunlight.
冷血动物的活动模式与其阳光的可用性紧密相关。
Ectotherms may bask in the sun to absorb heat and increase their body temperature.
冷血动物可能会晒太阳吸收热量并提高体温。
Some ectotherms have developed behavioral adaptations to regulate their temperature, such as basking or seeking shade.
一些冷血动物发展了行为适应来调节它们的温度，如晒太阳或寻找阴凉处。
The thermal sensitivity of ectotherms can make them vulnerable to rapid changes in climate.
冷血动物对温度的敏感性使它们容易受到快速气候变化的影响。