Black holes are dense, but their event horizons preclude observations.

黑洞密度足够高，但是他们的视界阻止了观察者。

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Since then, other researchers have come up with other quotidian examples of event horizons.

从此之后，其他研究者们也提出了有关视界的司空见惯的例子。

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Since then, other researchers have come up with other quotidian examples of event horizons.

而之后，其他研究人员也提出了关于视界的其它司空见惯的种种例子。

youdao

The sandwich is roughly 1, 500 times stiffer than a traditional metal body, which means you can't hurt it unless you start strafing around with a chisel - something quite reassuring when the extremities are unfamiliar event horizons.

BBC: Trick of the light: A California road trip

The festival became a source of expanding the horizons for each participant of the event in his perception of cultural diversity.

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