newborn infant英 [ˈnjuːbɔːn ˈɪnfənt]美 [ˈnuːbɔːrn ˈɪnfənt]网络 新生儿; 新生的婴儿医学英英释义nouna baby from birth to four weeksSynonym:neonatenewbornnewborn baby双语例句