The gravity of a black hole is so strong that not even light can escape it.
黑洞的引力场很强，光也无法逃出。
The light center of gravity method is applied to processing optic fiber exited spot signal.
采用“光重心法”对光斑信号进行处理。
The light center of gravity method is applied to processing optic fiber exited spot signal.
采用“光重心法”对光斑信号进行处理。
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