diff --git a/ddia/README.md b/ddia/README.md
index 07bdd0b5882ea773cd28c6bdb97e22d9a2cf8c37..41a9a23d0d7aa3a5550354368a3f9c6c763458a1 100644
--- a/ddia/README.md
+++ b/ddia/README.md
@@ -67,8 +67,8 @@
 | 第三章：存储与检索 | [ch3.md](ch3.md) |      | 初翻 |
 | 第四章：编码与演化 | [ch4.md](ch4.md) |      | 初翻 |
 | 第二部分：分布式数据——概览 | [part-ii.md](part-ii.md) | | 初翻 |
-| 第五章：复制 | [ch5.md](ch5.md) |      | 初翻 60% |
-| 第六章：分片 | [ch6.md](ch6.md) |      | 机翻 |
+| 第五章：复制 | [ch5.md](ch5.md) |      | 初翻 |
+| 第六章：分片 | [ch6.md](ch6.md) |      | 初翻 |
 | 第七章：事务 | [ch7.md](ch7.md) |      | 机翻 |
 | 第八章：分布式系统的麻烦 | [ch8.md](ch8.md) |      | - |
 | 第九章：一致性与共识 | [ch9.md](ch9.md) |      | - |
diff --git a/ddia/ch1.md b/ddia/ch1.md
index e18ef92f0f1776320663ef6998cabbde023b05e9..2c794cd3bb47a4a7f022991b3759ee8541300e13 100644
--- a/ddia/ch1.md
+++ b/ddia/ch1.md
@@ -385,7 +385,7 @@ Twitter的第一个版本使用了方法1，但系统努力跟上主页时间线
 
 ## 参考文献
 
-[1]: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.68.9136&rep=rep1&type=pdf	"Michael Stonebraker and Uğur Çetintemel: “'One Size Fits All': An Idea Whose Time Has Come and Gone,” at *21st International Conference on Data Engineering* (ICDE), April 2005."
+[1]: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.68.9136&rep=rep1&type=pdf	"Michael Stonebraker and Uğur Çetintemel: “'One Size Fits All': An Idea Whose Time Has Come and Gone,” at *21st International Conference on Data Engineering* (ICDE), April 2005."
 [2]: http://www.sei.cmu.edu/reports/92tr033.pdf	"Walter L. Heimerdinger and Charles B. Weinstock: “A Conceptual Framework for System Fault Tolerance,” Technical Report CMU/SEI-92-TR-033, Software Engineering Institute, Carnegie Mellon University, October 1992."
 [3]: https://www.usenix.org/system/files/conference/osdi14/osdi14-paper-yuan.pdf	"Ding Yuan, Yu Luo, Xin Zhuang, et al.: “Simple Testing Can Prevent Most Critical Failures: An Analysis of Production Failures in Distributed Data-Intensive Systems,” at 11th USENIX Symposium on Operating Systems Design and Implementation (OSDI), October 2014."
 [4]: http://techblog.netflix.com/2011/07/netflix-simian-army.html	"Yury Izrailevsky and Ariel Tseitlin: “The Netflix Simian Army,” techblog.netflix.com, July 19, 2011."
@@ -516,10 +516,8 @@ Twitter的第一个版本使用了方法1，但系统努力跟上主页时间线
      [doi:10.1109/COMPSAC.2008.50](http://dx.doi.org/10.1109/COMPSAC.2008.50)
 
 
+c
 
-
-------
-
-| 上一章                              | 目录                            | 下一章                               |
-| ----------------------------------- | ------------------------------- | ------------------------------------ |
-| [第一部分：数据系统基础](part-i.md) | [设计数据密集型应用](README.md) | [第二章：数据模型与查询语言](ch2.md) |
\ No newline at end of file
+|      |      |      |
+| ---- | ---- | ---- |
+|      |      |      |
\ No newline at end of file
diff --git a/ddia/part-ii.md b/ddia/part-ii.md
index 18969e205e22a5b0cbc910e00568d549a2554fa7..9220f4c25a029c7a515e55617d9501e2e9a57fb7 100644
--- a/ddia/part-ii.md
+++ b/ddia/part-ii.md
@@ -80,8 +80,8 @@
 
 ## 索引
 
-5. [复制](ch5.md) [机翻]
-6. [分片](ch6.md) [未翻]
-7. [事务](ch7.md) [未翻]
-8. [分布式系统的麻烦](ch8.md) [未翻]
-9. [一致性与共识](ch9.md) [未翻]
\ No newline at end of file
+5. [复制](ch5.md)
+6. [分片](ch6.md) 
+7. [事务](ch7.md) 
+8. [分布式系统的麻烦](ch8.md) 
+9. [一致性与共识](ch9.md) 
\ No newline at end of file
diff --git a/ddia/part-iii.md b/ddia/part-iii.md
index a68adfeef25c279c471ffc0dca1ce571fa2f1b11..c5b5bfe93863dd50fb4ec3e2e5ac1b5d135115f0 100644
--- a/ddia/part-iii.md
+++ b/ddia/part-iii.md
@@ -40,7 +40,7 @@
 
 ## 索引
 
-10. [批处理](ch10.md) [未翻]
-11. [流处理](ch11.md) [未翻]
-12. [数据系统的未来](ch12.md) [未翻]
+10. [批处理](ch10.md)
+11. [流处理](ch11.md)
+12. [数据系统的未来](ch12.md)