元音音标即元音音素,英语中共有20个元音音素.20个元音音素对应元音音素例子：1) [i:] sea,he,see,piece,ceiling 2) [i]sit,build,miss,myth 3) [e] bed,desk,head,4) [ æ ] bad,land,bank,stamp (a和e中间是连...