modified some comments

test=develop

paddle/fluid/operators/interpolate_op.cc

@@ -90,9 +90,9 @@ class InterpolateOpMaker : public framework::OpProtoAndCheckerMaker {
         "if Flase, are not aligned")
         .SetDefault(true);
     AddAttr<int>("align_mode",
-                 "(int, default \'1\'), can be \'0\' for "
-                 "src_idx = scale*(dst_indx+0.5)-0.5 , can be \'1\' for "
-                 "src_idx = scale*dst_index .")
+                 "(int, default \'1\'), optional for bilinear interpolation"
+                 "can be \'0\' for src_idx = scale*(dst_indx+0.5)-0.5 , "
+                 "can be \'1\' for src_idx = scale*dst_index .")
         .SetDefault(1);
     AddComment(R"DOC(
           This operator samples input X to given output shape by using specified

python/paddle/fluid/layers/nn.py

@@ -6649,7 +6649,7 @@ def image_resize(input,
                                input and output tensors are aligned, preserving the values at the 
                                corner pixels.
                                Default: True
-        align_mode(int)  :  An optional input to specify src_idx calculation. can be \'0\' 
+        align_mode(int)  :  An optional for bilinear interpolation. can be \'0\' 
                             for src_idx = scale*(dst_indx+0.5)-0.5 , can be \'1\' for 
                             src_idx = scale*dst_index .