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English

Strictly speaking, families and their membership are identified by analysing the so-called proper orbital elements rather than the current osculating orbital elements, which regularly fluctuate on timescales of tens of thousands of years.

Chinese

更確實的說,家族和成員的認定是依據分析所謂的固有軌道要素,而不是在數萬年的歲月中已經發生變動,現在的有共同點的軌道要素。