为什么机械表比石英表误差大

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select * from tbl_Articles WHERE ArticleID=2319979 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2319979 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2319979 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1360083,244839,140083,677981,2159255,1055039,1073116,872563,1045346,440472,1104290,1087337,352836,2190970,113841,468541,1766106,2275402,1669625,2026706,2299581,239451,1077523,153127,3066528,782598,306569,920695,1083265,1110708) ORDER BY field (ArticleID,1360083,244839,140083,677981,2159255,1055039,1073116,872563,1045346,440472,1104290,1087337,352836,2190970,113841,468541,1766106,2275402,1669625,2026706,2299581,239451,1077523,153127,3066528,782598,306569,920695,1083265,1110708)