1·Radio signals received from the galaxy's centre back up the black hole theory.
从该星系中心接收到的无线电信号证实了黑洞理论。
—— 《柯林斯英汉双解大词典》
2·Think of a three-dimensional spherical black hole that's copied and stacked out in one direction to create an oblong shape.
设想一个三维的球状黑洞，把它复制和堆放在一个方向上，就会构成一个长方形的形状。
3·Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl.
大多数天文学家认为，星系中心的大量物质是一个黑洞，它的引力导致气体旋转。
4·What got Dr. Clark and his colleagues excited is that, if their calculations are correct, the magnetar in question should have been a black hole.
克拉克博士和他的同事们兴奋的是，如果他们的计算正确的话，那么讨论中的磁星应该是一个黑洞。
5·Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。