HyukjinKwon commented on a change in pull request #32835:
URL: https://github.com/apache/spark/pull/32835#discussion_r648799210



##########
File path: python/docs/source/user_guide/pandas_on_spark/transform_apply.rst
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@@ -66,7 +66,7 @@ Please refer the API documentations.
 -----------------------------------------------------
 
 In :func:`DataFrame.koalas.transform_batch`, 
:func:`DataFrame.koalas.apply_batch`, :func:`Series.koalas.transform_batch`, 
etc., the ``batch``
-postfix means each chunk in Koalas DataFrame or Series. The APIs slice the 
Koalas DataFrame or Series, and
+postfix means each chunk in pandas APIs on Spark DataFrame or Series. The APIs 
slice the pandas APIs on Spark DataFrame or Series, and

Review comment:
       pandas-on-Spark DataFrame?

##########
File path: python/docs/source/user_guide/pandas_on_spark/transform_apply.rst
##########
@@ -85,8 +85,8 @@ then applies the given function with pandas DataFrame or 
Series as input and out
    ...
    >>> kdf.koalas.apply_batch(pandas_plus)
 
-The functions in both examples take a pandas DataFrame as a chunk of Koalas 
DataFrame, and output a pandas DataFrame.
-Koalas combines the pandas DataFrames as a Koalas DataFrame.
+The functions in both examples take a pandas DataFrame as a chunk of pandas 
APIs on Spark DataFrame, and output a pandas DataFrame.

Review comment:
       pandas-on-Spark DataFrame?




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