外边界 [数] outer boundary
- 它们不仅有一个外边界,还有一个内边界,称为“柯西”视界。
They have not only an outer event horizon but also an inner horizon, called a "Cauchy" horizon. - 那么,未来看来要被限制在地球的新的外边界之内,即同步轨道。
The future, then, looks bounded by that new outer limit of planet Earth, the geostationary orbit. - 黑洞拥有一个外边界,称为视界,在这个界限内任何物体都无法逃脱,因为物质开始以超光速运动。
They have outer boundaries, known as event horizons, beyond which nothing can escape because matter starts moving at faster-than-light speeds.
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