adj.哺乳类的，哺乳动物的
n.温血动物，哺乳类动物

Mammals are characterized by their possession of mammary glands that produce milk for their young.
其中文释义是：哺乳动物的一个显著特征是它们拥有能为幼崽分泌乳汁的乳腺。
The platypus is a unique mammal, being both egg-laying and venomous.
鸭嘴兽是一种独特的哺乳动物，它既是卵生动物，又具有毒液。
Elephants are social mammals, often found in family groups led by a matriarch.
这句话表示：大象是群居哺乳动物，通常由一个雌性首领带领家庭群体。
Whales are marine mammals that migrate long distances each year to feed and breed.
这句话说明：鲸鱼是海洋哺乳动物，每年会进行长距离迁徙以觅食和繁殖。
Marsupials, like kangaroos and koalas, give birth to undeveloped young that continue to grow in a pouch.
这句话描述了有袋类哺乳动物如袋鼠和考拉，它们生产的是未发育完全的幼崽，在育儿袋中继续生长。
Primates, including humans, are a group of mammals known for their forward-facing eyes and grasping hands.
这句话指出：包括人类在内的灵长类动物是一类以直视的眼睛和抓握的手著称的哺乳动物。
Many mammals hibernate during the cold winter months to conserve energy.
这句话表明：许多哺乳动物在寒冷的冬季会冬眠以节省能量。
The echidnas, native to Australia, are spiny anteaters and are also considered mammals due to their warm-blooded nature.
这句话介绍的是澳大利亚特有的针鼹，它们虽然有刺，但因其恒温的特性也被归类为哺乳动物。
A newborn mammal's first instinct is usually to seek warmth and comfort from its mother's fur.
新生哺乳动物的第一个本能通常是寻求母亲皮毛下的温暖和舒适。
Some mammals, like bats, have evolved the ability to fly, despite not having wings like birds.
这句话提到有些哺乳动物，如蝙蝠，尽管没有像鸟类那样的翅膀，却进化出了飞行能力。