给定一段英文文本，按照指定的字数将其拆分成若干段落。输出拆分后的文本。


英文文本: A black hole is a place in space where gravity pulls so much that even light can't get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. As the star runs out of fuel, some of its mass flows into the center. Eventually, the center gets so heavy that it pulls in more and more matter. The gravity gets stronger and stronger. Nothing-not even light-can escape.
拆分字数: 50
A black hole is a place in space where gravity pulls so 
much that even light can't get out. The gravity is so 
strong because matter has been squeezed into a tiny 
space. This can happen when a star is dying. As the 
star runs out of fuel, some of its mass flows into the 
center. Eventually, the center gets so heavy that it 
pulls in more and more matter. The gravity gets 
stronger and stronger. Nothing-not even light-can 
escape.