2 files changed, 10 insertions, 10 deletions

diff --git a/doc/docs/doc/README.md b/doc/docs/doc/README.md
index 502f7b6..4a408fe 100755
--- a/doc/docs/doc/README.md
+++ b/doc/docs/doc/README.md
@@ -1925,22 +1925,22 @@ x * 2
 </pre>
 </YueDisplay>
 
-If you wish to have further code after your backcalls, you can set them aside with a do statement.
+If you wish to have further code after your backcalls, you can set them aside with a do statement. And the parentheses can be omitted with non-fat arrow functions.
 
 ```moonscript
 result, msg = do
-  (data) <- readAsync "filename.txt"
+  data <- readAsync "filename.txt"
   print data
-  (info) <- processAsync data
+  info <- processAsync data
   check info
 print result, msg
 ```
 <YueDisplay>
 <pre>
 result, msg = do
-  (data) <- readAsync "filename.txt"
+  data <- readAsync "filename.txt"
   print data
-  (info) <- processAsync data
+  info <- processAsync data
   check info
 print result, msg
 </pre>
diff --git a/doc/docs/zh/doc/README.md b/doc/docs/zh/doc/README.md
index e5efe3b..d7b8361 100755
--- a/doc/docs/zh/doc/README.md
+++ b/doc/docs/zh/doc/README.md
@@ -1886,22 +1886,22 @@ x * 2
 </pre>
 </YueDisplay>
 
-如果你希望在反向回调处理后继续编写更多其它的代码，你可以使用do语句将不归属反向回调的代码分开。
+如果你希望在反向回调处理后继续编写更多其它的代码，可以使用 do 语句将不属于反向回调的代码分隔开。对于非粗箭头函数的反向回调，回调返回值的括号也是可以省略的。
 
 ```moonscript
 result, msg = do
-  (data) <- readAsync "文件名.txt"
+  data <- readAsync "文件名.txt"
   print data
-  (info) <- processAsync data
+  info <- processAsync data
   check info
 print result, msg
 ```
 <YueDisplay>
 <pre>
 result, msg = do
-  (data) <- readAsync "文件名.txt"
+  data <- readAsync "文件名.txt"
   print data
-  (info) <- processAsync data
+  info <- processAsync data
   check info
 print result, msg
 </pre>