8个双元音：[ei] [ai] [əu] [au] [כi] [iə] [eə] [uə]含有这8个双元音的单词音标要几个?各两个way[wei] day[dei]no [nəu] go [gəu]high[hai] eye [ai] how [hau] now[nau] boy [bכi]toy [tכi]ear[iə] here[hiə] care [keə] wear [weə]tour[tuə] poor [puə]