辅音的发音部位
https://wenku.baidu.com/view/0444a9145727a5e9856a6136.html
https://en-yinbiao.xiao84.com/ipacharts/vowels.html
https://wenku.baidu.com/view/1182759f6bd97f192379e915.html
https://mp.weixin.qq.com/s?src=11×tamp=1560662002&ver=1671&signature=TrH9P-N2kRvrCKdE5ARzhxNH3YEyDGSKDC*ZJTyvsugIlmRmrYYendQjnPjPSiiC2ig2JJQayrcN3P8jZ2zP-MndNkBf4zg6o*yhl6p9FbRNyUG-aYKzvJuBD1qASrdL&new=1