Update aggregation-introduction.po

Author: tomliugen

locale/zh/LC_MESSAGES/core/aggregation-introduction.po

@@ -32,6 +32,8 @@ msgid ""
 "requirements."
 msgstr ""
 "*聚合*是泛指各种可以处理批量记录并返回计算结果的操作。MongoDB提供了丰富的聚合操作，"
+"用于对数据集执行计算操作。在:program:`mongod` 实例上执行聚合操作可以大大简化应用的代码，"
+"并降低对资源的消耗。"
 
 # 27f9370e5e8d42d3bee0e4ac1a9e7b83
 #: ../source/core/aggregation-introduction.txt:17
@@ -40,16 +42,18 @@ msgid ""
 "<collection>` of documents as an input and return results in the form of one"
 " or more documents."
 msgstr ""
+"在MongoDB中，像查询之类的聚合操作都是使用:term:`collections <集合> 中的文档作为输入，"
+"最终的结果可以输出一个或者多个文档。"
 
 # db590a4fea584978a5d138ec6c732a7e
 #: ../source/core/aggregation-introduction.txt:22
 msgid "Aggregation Modalities"
-msgstr ""
+msgstr "聚合方式"
 
 # 073fd8c96dde463680e2c7e34b7ae039
 #: ../source/core/aggregation-introduction.txt:25
 msgid "Aggregation Pipelines"
-msgstr ""
+msgstr "聚合管道"
 
 # f769b5ad3a9348a3a66c71a91deff673
 #: ../source/core/aggregation-introduction.txt:27
@@ -59,14 +63,16 @@ msgid ""
 "enter a multi-stage pipeline that transforms the documents into an "
 "aggregated result."
 msgstr ""
+"MongoDB 2.2 引入了一种新的基于数据处理管道概念的:doc:`聚合框架 </core/aggregation-"
+"pipeline>`。通过一个多阶段的管道，将一组文档转化为最终的聚合结果。 "
 
 # e417b234fbc04bf5959fc2f1218b8bb5
 #: ../source/core/aggregation-introduction.txt:32
 msgid ""
 "The most basic pipeline stages provide *filters* that operate like queries "
 "and *document transformations* that modify the form of the output document."
 msgstr ""
-
+"一个管道最基本的功能包含类似于查询的*过滤*功能，和可以修改输出结果的*文档转化*功能"
 # 495a185c6cfe4a12ac89b536d5da01f4
 #: ../source/core/aggregation-introduction.txt:36
 msgid ""