每日背誦第二期79

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Air flowing through the shell or cup has also been suggested as a possible cause, but experiments in soundproof rooms have disproved this. No sound comes from the shell, though there is plenty of air in the room. In fact, the answer is fairly simple, and can be summed up in two words: ambient noise.

在貝殼或杯子里流動的空氣，也被認為是產生聲音的可能因素之一，然而在隔音的房間里所做的實驗已將這個可能推翻。雖然隔音房內有充足的空氣，貝殼里卻一片安靜。事實上，問題的答案非常簡單，簡單到可以用兩個字來概括：周圍的雜音。

(短文節(jié)選,本篇始于：貝殼傳來海洋之音)

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