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聲音傳播的速度為3X10^9,看看教堂的設計以及高度,我們可以得出計算。。。(計算半個小時),因此我站在教堂的300米外聽會最清楚。8964 copyright protection314PENANACRzvNGBvfR 維尼
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我真心喜歡你,希望你可以當我的女友,我倆一起永遠在一起好嗎?8964 copyright protection314PENANAwxe2iOGSg7 維尼
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