Hawking USES a variation of the "grandfather paradox" to show why time travel can give cosmologists nightmares.

霍金用一个“祖父悖论”的变异，以展示为什么时间旅行可以为宇宙学家带来噩梦。

youdao

Hawking USES a variation of the "grandfather paradox" to show why time travel can give cosmologists nightmares.

霍金用一个“祖父悖论”的变异，以展示为什么时间旅行可以为宇宙学家带来噩梦。

youdao