什么是信标间隔？

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select * from tbl_Articles WHERE ArticleID=1036246 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1036246 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1036246 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1973052,3209102,3057984,3205346,472122,1178226,1808958,3357371,1073773,3172316,1023865,2075171,1169316,1641672,362755,987087,373469,935220,832381,906144,1208364,1070585,1140395,2017882,640515,2782187,1149251,849343,1175824,810243) ORDER BY field (ArticleID,1973052,3209102,3057984,3205346,472122,1178226,1808958,3357371,1073773,3172316,1023865,2075171,1169316,1641672,362755,987087,373469,935220,832381,906144,1208364,1070585,1140395,2017882,640515,2782187,1149251,849343,1175824,810243)