单词:perforated-plate sound absorption construction
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News Report Egyptian Tombs Script Archaeologist have uncovered two tombs that date back more than 2,500 years in the part of Cairo where the ancient city of Heliopolis once stood, according to Egyptian antiquity authorities. Although there is a moder
Imagine a world where sunlight can be captured to produce electricity anywhere, on any surface. The makers of thin-film flexible solar cells imagine that world too. But a big problem has been the amount of silicon needed to harvest a little sunshine.
Carbon Street is a long, tree-lined street with majestic houses on either side. The houses are owned by millionaires who cherish their quiet, residential street. Throughout the day, the only noise is usually the sound of various birds singing in the
Around the world, many people start their day with a cup of coffee, a cappuccino, or an espresso. At the same time, there are many people with various thyroid conditions who rely on synthetic thyroid hormone replacement medication like levothyroxine
A Happy New Year, everyone. Many thanks to all of you who sent e-mails to wish me a speedy recovery from the flu. I am now much better thank you. Todays podcast is a delayed Christmas podcast. I would have made it before Christmas, but I was unwell s