an area in space that nothing, not even light, can escape from, because gravity (= the force that pulls objects in space towards each other) is so strong there 黑洞（宇宙中包括光线在内的任何东西都无法逃逸的强引力区域） - (figurative)
The company viewed the venture as a financial black hole (= it would use a lot of the company's money with no real result). 公司认为该项投资是财政上的一个黑洞。 🔊🔊 - (figurative)
Thousands of people have been plunged into the black hole of unemployment. 成千上万的人陷入了失业的黑洞。
- (figurative)