Animals become indifferent to their young as soon as their young can look after themselves, but human beings, owing to the length of infancy, find this less easy.是什么意思_Animals become indifferent to their young as soon as their young can look after themselves, but human beings, owing to the length of infancy, find this less easy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句