diff --git a/01.fit_a_line/README.cn.md b/01.fit_a_line/README.cn.md
index ae33f48fe7ec4742b6fca56b17d76d95b1c05b40..a969c752767a575d78e86bd51d763702b91eb551 100644
--- a/01.fit_a_line/README.cn.md
+++ b/01.fit_a_line/README.cn.md
@@ -180,7 +180,7 @@ feed_order=['x', 'y']
 除此之外，可以定义一个事件相应器来处理类似`打印训练进程`的事件：
 
 ```python
-# Specify the directory path to save the parameters
+# Specify the directory to save the parameters
 params_dirname = "fit_a_line.inference.model"
 
 # Plot data
@@ -191,11 +191,11 @@ plot_cost = Ploter(train_title, test_title)
 
 step = 0
 
-# event_handler to print training and testing info
+# event_handler prints training and testing info
 def event_handler_plot(event):
     global step
     if isinstance(event, fluid.EndStepEvent):
-        if event.step % 10 == 0: # every 10 batches, record a test cost
+        if event.step % 10 == 0: # record the test cost every 10 seconds
             test_metrics = trainer.test(
                 reader=test_reader, feed_order=feed_order)
 
diff --git a/01.fit_a_line/image/ranges.png b/01.fit_a_line/image/ranges.png
index 5d86b12715f46afbafb7d50e2938e184219b5b95..5325df4800985983e17476f007658d1cdb170b1c 100644
Binary files a/01.fit_a_line/image/ranges.png and b/01.fit_a_line/image/ranges.png differ
diff --git a/01.fit_a_line/index.cn.html b/01.fit_a_line/index.cn.html
index f8a13b7744eb7b11c63bea328bc1222c730760d2..9a0b9918dcbbb31c4615908b3cc323eb59b36835 100644
--- a/01.fit_a_line/index.cn.html
+++ b/01.fit_a_line/index.cn.html
@@ -222,7 +222,7 @@ feed_order=['x', 'y']
 除此之外，可以定义一个事件相应器来处理类似`打印训练进程`的事件：
 
 ```python
-# Specify the directory path to save the parameters
+# Specify the directory to save the parameters
 params_dirname = "fit_a_line.inference.model"
 
 # Plot data
@@ -233,11 +233,11 @@ plot_cost = Ploter(train_title, test_title)
 
 step = 0
 
-# event_handler to print training and testing info
+# event_handler prints training and testing info
 def event_handler_plot(event):
     global step
     if isinstance(event, fluid.EndStepEvent):
-        if event.step % 10 == 0: # every 10 batches, record a test cost
+        if event.step % 10 == 0: # record the test cost every 10 seconds
             test_metrics = trainer.test(
                 reader=test_reader, feed_order=feed_order)