1、A speech sound produced in the pharynx
由咽喉發(fā)出的聲音

2、A speech sound pronounced with such a vibration
顫音講話器官顫動發(fā)出的語音

3、a speech sound made with the vocal tract open
聲道敞開發(fā)出的語音。

4、Evidence came up that specific speech sound are recognized by babies as young as 6 months.
有證據(jù)表明，6個月大的嬰兒可以辨別特殊的語音。