- Onemorning,however,thesonsawanoldbirdwasfeedingherbig-mouthed-chirping-babybirdswhichwerefeatherlesshefeltsomuchguiltythatherepentedofhavingmadesomanymistakes.Themaleincubates(孵化)theone-poundeggonhisfeet,coveringitwithafeatherlessfold(褶)ofskincalleda...
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