题目内容
______ are produced by moving from one vowel position to another through intervening positions.
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Of the three branches of phonetics, the longest established, and until recently the most highly developed, is ______.
The consonant [f] in English can be correctly described as having the following phonetic features: ______.
In linguistics, ______ is focused on that how a speaker uses his speech organs to articulate the sounds.
The initial sound in ______ is a velar stop.
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