speech synthesis
US /ˈspiːtʃ ˌsɪnθ.ə.sɪs/
UK /ˈspiːtʃ ˌsɪnθ.ə.sɪs/

1.
语音合成
the artificial production of human speech
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Modern navigation systems often use speech synthesis to provide directions.
现代导航系统经常使用语音合成来提供方向。
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Advances in speech synthesis have made virtual assistants sound more natural.
语音合成的进步使虚拟助手听起来更自然。