6楼:[图]【超全】自然拼读发音规则汇总打印版
https://www.xiaohongshu.com/discovery/item/62f08729 ..
4楼:[图]http://www.hjenglish.com/yinbiao/p787688/
https://wenku.baidu.com/view/ef0ce1160b4e767 ..
3楼:[图]20个元音音标发音图解
https://wenku.baidu.com/view/cd02fe5777232f60ddcca177.html
1楼:[图]https://mp.weixin.qq.com/s?src=11×tamp=1560662002&ver=1671&signature=TrH9 ..