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Update edgex_meta.md

jinfahua hace 5 años
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      docs/zh_CN/edgex/edgex_meta.md

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docs/zh_CN/edgex/edgex_meta.md

@@ -83,5 +83,5 @@ SELECT temperature,humidity, meta(id) AS eid,meta(Created) AS ec, meta(temperatu
 Kuper 的 ``meta`` 函数可以用于访问元数据,以下列出了所有在 EdgeX 的 ``Events`` 和 ``Reading`` 中支持的 key,
 
 - Events: id, pushed, device, created, modified, origin, correlationid
-- Readning: id, created, modified, origin, pushed, device
+- Reading: id, created, modified, origin, pushed, device