<正>地球本是一个喧嚣的地方,但新冠肺炎疫情的暴发让地球变得安静起来。这会带来一个什么样的意外之"喜"呢?Humans are a really noisy species: hammering and digging, flying and driving, delivering heavy cargo all over the world. And those activities create noise as if it were from an earthquake,
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