- 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出。 - It is pronounced by raising the tongue tip against the upper teethridge to block the air and then putting it down to release the air.
舌尖顶住上齿龈，阴住气流，然后移下舌尖，放出气流。
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