無規律性. 聲音不算高。
所有跟帖:
• 聲音在物理上講一般包含聲強和音頻兩個指標。 -00zz7788- ♂ (39 bytes) () 03/01/2011 postreply 19:20:05
• 聲音在物理上講一般包含聲強和音頻兩個指標。 -00zz7788- ♂ (39 bytes) () 03/01/2011 postreply 19:20:05
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