diff --git a/README.md b/README.md
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@@ -1,2 +1,3 @@
 # PcdReader
-Read  PCD file with C#. 用C#读取PCD点云文件
+Read PCD file with C#. Include the binary file.
+用C#读取PCD点云文件，包括二进制文件和压缩的二进制文件