What do we call animals that give milk to their young?

譯句:給幼崽哺乳的動(dòng)物被稱為什么?(答案附在文末)
young /j??/? ?adj. 年輕的, 沒有經(jīng)驗(yàn)的;n. (動(dòng)物的)崽,仔,年輕人
反義詞:adj. aged, elderly, old, experienced,
慣用語:
young and old? 老老少少
young lady? 小姐,女士
young person 少年人,未成年人
young age 年輕時(shí)代,童年
young generation 年輕一代
young fellow 小伙子
the young pioneers 少先隊(duì),少先隊(duì)員
young at heart 年輕的心,人老心不老
例句:
??The lion fought to protect her young.
那頭獅子為了保護(hù)其幼獅而進(jìn)行搏斗。
??He was displaced by another young man.
他已被另一個(gè)年輕人頂替。
??The event was attended by many people from the area, both young and old.
該地區(qū)許多人參加了這次活動(dòng),有年輕人也有老年人。
mammal /'m?ml/? ?n. 哺乳動(dòng)物
例句:
??Whale are mammals that live in the sea.
鯨是生活在海洋中的哺乳動(dòng)物。
??The fish-like mammal is considered intelligent and friendly.
這種類似魚類的哺乳動(dòng)物被認(rèn)為是聰明和友好的。
答案: mammals