When it does, gravity will cause the sun's core to contract.
当太阳能量耗尽，地心引力会使得太阳核心缩小。
Messenger's analysis of the surface rock, and of the gravity profile of the core, could help explain.
信使号对岩石层以及核心万有引力的描述和分析或许可以帮助解释。
Messenger's analysis of the surface rock, and of the gravity profile of the core, could help explain.
信使号对岩石层以及核心万有引力的描述和分析或许可以帮助解释。
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