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F = G \u00d7 (m1 \u00d7 m2) \/ r2<\/sup><\/sup><\/p>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

\u5716\u4f86\u6e90: I, Dennis Nilsson<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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