Outside a black hole is the normal world in which we live and on which we can experiment.

在黑洞的外面，是我们生活的正常世界，我们可以用这个世界做实验。

youdao

Outside a black hole is the normal world in which we live and on which we can experiment.

在黑洞的外面，是我们生活的正常世界，我们可以用这个世界做实验。

youdao