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来源:雅诚德英语网
Radiation from hot, young stars has slowly eroded the nebula over millions of years.
数百万年来炎热的年轻恒星发出的辐射不断的侵蚀着这个星云。
Radiation from hot, young stars has slowly eroded the nebula over millions of years.
数百万年来炎热的年轻恒星发出的辐射不断的侵蚀着这个星云。