Without getting into too much detail, a time machine like a Tipler cylinder could create a closed timelike curve.

简单来说，像提普勒柱体这样的时间机器可以创造出一个封闭的时间型曲线。

That is, if you have access to a big enough black hole, or to a time machine like a Tipler cylinder.

也就是说，只要你能进入到一个足够大的黑洞，或者像提普勒柱体这样的时间机器的话。