It is pronoumced by raising the tongue tip against the upper teethridge to block the air and then putting it down to release the air.
下唇和上齿接触，形成一条狭缝，气流从狭缝中磨擦而
。
It is pronoumced by raising the tongue tip against the upper teethridge to block the air and then putting it down to release the air.
下唇和上齿接触，形成一条狭缝，气流从狭缝中磨擦而。
：以上例句、词性
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动生成，部未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
