The core of each sphere is a crystal of lithium iron phosphate.

每个小球的核都是一个锂磷酸铁晶体。

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The home is the crystal of society-thus the core of national character.

家是社会的结晶——民族性格的核心。

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The home is the crystal of society-thus the core of national character.

家是社会的结晶——民族性格的核心。

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