他的发言空洞无物。
Speech sounds are the physical substance of language.
语音是语言客观存在的物质形式。
Phonetics has to do with the production of speech sounds.
其中音位学与语音的功能有关而语音学与语音的产生有关。
people who cannot make speech sounds, or cannot make them clearly;
无法发音或发音不清楚的患者；
The letters of the alphabet were designed to represent speech sounds.
字母表中的字母是用来表示语音的。
The regional influence in the speech sounds and the accent is high in English.
地区差异对英语读音和声调有很大影响。
Transmission of speech or other sounds.
语言或其它声音的传输。
He tries again, and it sounds like a baby trying to imitate speech.
他又试了次，听起来像是小孩模仿着演讲。
He tries again, and it sounds like a baby trying to imitate speech.
他又试了次，听起来像是小孩模仿着演讲。
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