diff --git a/sources/tech/20170823 How Machines Learn A Practical Guide.md b/sources/tech/20170823 How Machines Learn A Practical Guide.md
index 3479d48e8c..02de1c23b9 100644
--- a/sources/tech/20170823 How Machines Learn A Practical Guide.md	
+++ b/sources/tech/20170823 How Machines Learn A Practical Guide.md	
@@ -1,3 +1,5 @@
+translating by flowsow
+
 How Machines Learn: A Practical Guide
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