ZT: What causes the hum? （北岸）
你有听见吗？ http://www.3news.co.nz/What-causes-the-hum/tabid/817/articleID/312083/Default.aspx This thing really exists. Really. It's been recorded. It's been measured. It's not the Bermuda triangle or the Loch Ness monster - it is r...澳洲华人论坛