Nuclear fusion is the source of energy in stars such as the sun

核聚变是恒星提供能量的源泉，就像太阳一样

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Nuclear fusion is the energy source that keeps the sun alive.

核聚变是使太阳保持活力的能源。

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Nuclear fusion is the energy source that keeps the sun alive.

核聚变是使太阳保持活力的能源。

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