Which animals do NOT feed their young: mammals, birds, reptiles？
🌷 译句： 哪种动物不喂养自己的幼崽：哺乳动物、鸟类还是爬行动物？ （答案附文末）
🌷 mammal/'mæml/ n. 哺乳动物
[例句]：
• Whales are mammals that live in the sea.
鲸鱼是生活在海洋中的哺乳动物。
• They found the mammal world especially interesting.
他们发现哺乳动物的世界非常有趣。
• The sea otter is a rare and valuable mammal.
海獭是一种稀珍的哺乳动物。
🌷 reptile/'rɛptaɪl/ n. 爬行动物, 爬虫
[例句]：
• Birds, reptiles and insects come from eggs.
鸟类、爬虫及昆虫都是卵生动物。
• As the day warms up, reptiles become active.
当气温回升，爬虫类动物便开始活动。
• The Chinese alligator is one of the most endangered reptiles in the world.
扬子鳄是世界上最危险的爬行动物之一。
🌷 答案：reptiles
