刚孵出的小海龟太小了，即使有保温和逆流交换系统，也无法保持体温。
Hatchlings are simply too small to conserve body heat, even with insulation and countercurrent exchange systems.
一开始，他模仿了刚孵出的乌鸦的叫声。
刚孵出的赤颈鸊鷉在妈妈羽翼的庇护下，惬意地打量着周围的一切。
A newly hatched red-necked grebe relaxes, safe under mom's wing.
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