If a black hole devours a planet and no one is around to hear it, does it still make a
sound?
Physicists and astronomers have been trying to map astronomical date through sound for
decades — and now ...
| English Article | Word Count | Duration | Accuracy | Speed | Backspace | Error | Slogan |
|---|---|---|---|---|---|---|---|
| 《NASA Recorded a Black Hole's Song, and You Can Lis》 | 501字 | 4.2分钟 | 100% | 119 CPM | 56 次 | 0 | 及格，继续努力！ |
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