chapter43_part5: /404_Parent_Child/60_Children_agg.asciidoc

404_Parent_Child/60_Children_agg.asciidoc

@@ -1,14 +1,10 @@
 [[children-agg]]
-=== Children Aggregation
+=== 子文档聚合
 
-Parent-child supports a
-http://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-children-aggregation.html[`children` aggregation]  as ((("aggregations", "children aggregation")))((("children aggregation")))((("parent-child relationship", "children aggregation")))a direct analog to the `nested` aggregation discussed in
-<<nested-aggregation>>.  A parent aggregation (the equivalent of
-`reverse_nested`) is not supported.
-
-This example demonstrates how we could determine the favorite hobbies of our
-employees by country:
+在父-子文档中，支持
+http://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-children-aggregation.html[子文档聚合]，这一点和((("aggregations", "children aggregation")))((("children aggregation")))((("parent-child relationship", "children aggregation"))) <<nested-aggregation>> 类似。但是，对于父文档的聚合查询是不支持的（和 `reverse_nested` 类似）。
 
+如下查询展示了如何在不同国家下，按照雇员爱好的维度进行聚合查询：
 [source,json]
 -------------------------
 GET /company/branch/_search
@@ -37,7 +33,6 @@ GET /company/branch/_search
   }
 }
 -------------------------
-<1> The `country` field in the `branch` documents.
-<2> The `children` aggregation joins the parent documents with
-    their associated children of type `employee`.
-<3> The `hobby` field from the `employee` child documents.
+<1> `country` 是 `branch` 的一个字段。
+<2> 对子文档的聚合查询结果和对父文档的聚合查询结果，是通过 `employee` type 关联起来的。
+<3> `hobby` 是 `employee` 子文档的一个字段。