poikilothermy

例句：

1. 1. Poikilothermic animalsare those that can regulate their body temperatureindependently.
   恒温动物是指那些能够独立调节体温的动物。
2. 2. The poikilothermicspecies of the Arctic tiger is oneof the rarest and most endangered species in the world.
   北极虎的恒温物种是世界上稀有度最高、最濒危的物种之一。
3. 3. In orderto survive in cold environments, poikilothermic creatures must have mechanisms tomaintain a stable internal temperature.
   为了在寒冷的环境中生存，恒温生物必须具有维持内部温度稳定的机制。