小键人1339727的《NASA Recorded a Black Hole's Song, and You Can Lis》成绩 - 打字成绩 - 在线打字练习（dazi.91xjr.com）

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 ...