Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/446e4cde89bcb9d3724f707e9c3e60d7.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 front extreme position例句_front extreme position英汉例句_front extreme position双解例句_94生活常识网有道词典
A cardinal vowel is a vowel sound produced when the tongue is in an extreme position, either front or back, high or low. 当舌头位于极端的位置，发出的元音就是定位元音，不论位置的前后或高低。