Question

开的发音时，舌头放低并放平，口腔敞开，正如bath一词中的a和father中的a发音一样时。用于元音发音

Accepted Answer

kāi de fāyīn shí shétou fàngdī bìng fàngpíng kǒuqiāng chǎngkāi zhèngrú yī cí zhòngdì hé zhòngdì fāyīn yīyàng shí yòngyú yuányīn fāyīn

Pronounced with the tongue placed low and flat and with the oral cavity wide open, like the a in bath when pronounced like the a in father. Used of vowels.

Back	开的发音时，舌头放低并放平，口腔敞开，正如bath一词中的a和father中的a发音一样时。用于元音发音
Front	kāi de fāyīn shí shétou fàngdī bìng fàngpíng kǒuqiāng chǎngkāi zhèngrú yī cí zhòngdì hé zhòngdì fāyīn yīyàng shí yòngyú yuányīn fāyīn Pronounced with the tongue placed low and flat and with the oral cavity wide open, like the a in bath when pronounced like the a in father. Used of vowels.

Fāyīn Shí Zhòngdì Pronounced 开的发音时，舌头放低并放平，口腔敞开，正如bath一词中的a和father中的a发音一样时。用于元音发音 Kāi De Shétou