物體在液體裏如何傳聲??

First, the object vibrates. Then because of this, the liquid vibrates too. And because liquid and gas can transfer sound waves, so the sound by the object is transfered.

2008-09-06 18:48:39 補充：
Liquid transfer waves as transverse since liquid can hardly be compressed.

去這個網址，很有用的：
http://www.bud.org.tw/Ma/Ma23.htm