Cherry pick en doc, test=release/1.6, test=document_fix (#20481)

python/paddle/fluid/dygraph/base.py

@@ -150,15 +150,15 @@ def _print_debug_msg(limit=5, is_test=False):
 @framework.dygraph_only
 def to_variable(value, block=None, name=None):
     """
-    This function will create a variable from ndarray
+    The API will create a ``Variable`` object from numpy\.ndarray or Variable object.
 
-    Args:
-        value(ndarray): the numpy value need to be convert
-        block(fluid.Block|None): which block this variable will be in
-        name(str|None): Name of Variable
+    Parameters:
+        value(ndarray): The numpy\.ndarray object that needs to be converted, it can be multi-dimension, and the data type is one of numpy\.{float16, float32, float64, int16, int32, int64, uint8, uint16}.
+        block(fluid.Block, optional): Which block this variable will be in. Default: None.
+        name(str, optional): The default value is None. Normally there is no need for user to set this property. For more information, please refer to :ref:`api_guide_Name`
 
-    return:
-        Variable: The variable created from given numpy
+    Returns:
+        Variable: ``Tensor`` created from the specified numpy\.ndarray object, data type and shape is the same as ``value`` .
 
     Examples: