1. The Antarctic penguins have adapted to the harsh environment by being euthermic in sub-zero temperatures.
南极企鹅通过在零下温度下保持体温正常来适应恶劣的环境。
2. Some reptiles are euthermic, which means they can regulate their body temperature internally.
一些爬行动物是体温恒定的，这意味着它们能够自我调节体温。