就是分不清 在填定冠词a an时要弄错
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Consonantsare sounds produced by constricting orobstructing the vocal tract at some place to divert, impede or completelyshut off the flow of air in the oral cavity.
Consonantsare sounds produced by constricting orobstructing the vocal tract at some place to divert, impede or completelyshut off the flow of air in the oral cavity.
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