diff --git a/sources/tech/20180207 23 open source audio-visual production tools.md b/sources/tech/20180207 23 open source audio-visual production tools.md
index b6b748ec39..fd196200ce 100644
--- a/sources/tech/20180207 23 open source audio-visual production tools.md	
+++ b/sources/tech/20180207 23 open source audio-visual production tools.md	
@@ -1,4 +1,3 @@
-luming translating
 23 open source audio-visual production tools
 ======
 
diff --git a/sources/tech/20191007 Understanding Joins in Hadoop.md b/sources/tech/20191007 Understanding Joins in Hadoop.md
index ea0025a9d2..4c34ed896c 100644
--- a/sources/tech/20191007 Understanding Joins in Hadoop.md	
+++ b/sources/tech/20191007 Understanding Joins in Hadoop.md	
@@ -1,5 +1,5 @@
 [#]: collector: (lujun9972)
-[#]: translator: (heguangzhi)
+[#]: translator: ( )
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diff --git a/sources/tech/20191017 Using multitail on Linux.md b/sources/tech/20191017 Using multitail on Linux.md
index 3b6fc7ca78..b89ef375d2 100644
--- a/sources/tech/20191017 Using multitail on Linux.md	
+++ b/sources/tech/20191017 Using multitail on Linux.md	
@@ -1,5 +1,5 @@
 [#]: collector: (lujun9972)
-[#]: translator: (wenwensnow)
+[#]: translator: ( )
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diff --git a/sources/tech/20191028 Enterprise JavaBeans, infrastructure predictions, and more industry trends.md b/sources/tech/20191028 Enterprise JavaBeans, infrastructure predictions, and more industry trends.md
index f1d2b48d0d..e915fe74d9 100644
--- a/sources/tech/20191028 Enterprise JavaBeans, infrastructure predictions, and more industry trends.md	
+++ b/sources/tech/20191028 Enterprise JavaBeans, infrastructure predictions, and more industry trends.md	
@@ -1,5 +1,5 @@
 [#]: collector: (lujun9972)
-[#]: translator: (warmfrog)
+[#]: translator: ( )
 [#]: reviewer: ( )
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 [#]: url: ( )