One begins a foreign language by learning the speech sounds.

学习外语， 先从语音入手。

《新英汉大辞典》

The speech sounds of all languages are gradually but constantly changing.

各种语言的语音总在不断变迁。

《新英汉大辞典》

people who cannot make speech sounds, or cannot make them clearly;

无法发音或发音不清楚的患者；

youdao

This helps children become more aware of how their tongues, throats and mouths are positioned when they produce various speech sounds.

ECONOMIST: The cat sat on the tam | The

Computers invaded my life in 1985, when my mother, a master's student at UTEP, bought a RadioShack Tandy TRS-80 4P to pound out her thesis on the negative transfer of speech sounds from second to first language.

ENGADGET: Growing Up Geek: Christopher Trout Alt

Michael Studdert-Kennedy, a psychologist at the Haskins Laboratory, in New Haven, Connecticut, and one of the most vigorous critics of the approach, argues that other studies have shown that the brain processes speech sounds completely differently from non-speech sounds, and that the hearing problem identified by Dr Merzenich's group thus has nothing to do with dyslexia.

ECONOMIST: The cat sat on the tam | The