ほ乳類 哺乳 哺乳動物 哺乳類
any warm-blooded vertebrate having the skin more or less covered with hair young are born alive except for the small subclass of monotremes and nourished with milk
皮膚がほぼ毛で覆われている、温血脊椎動物 単孔類の小亜綱を除いて子供は生きたまま生まれミルクで育てられる