Mammals are animals such as humans, dogs, lions, and whales. In general, female mammals give birth to babies rather than laying eggs, and feed their young with milk. 哺乳动物
noun [集合/集体]哺乳动物
A whale is a kind of mammal. 鲸是一种哺乳动物。
mammal
“ -al” ⌜ 表示具有某种性质的 - indicating pertaining to or characterized by ~ ⌟