下列哪位科学家发现了摆的等时性？（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29181' and id < 2374138 and id<>'2374138' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29181' and id > 2374138 and id<>'2374138' order by id asc limit 5